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every calculation.

130+ free calculators for construction, architecture and interior design. From land measurement to structural steel — built for India, ready for the world.

130+

Calculators

Browse by category

12 categories · 130+ calculators

🧱

Construction & Civil

Brick, concrete, cement, steel, sand

18 calculators →

🟫

Flooring & Tiling

Tiles, marble, grout, vinyl

7 calculators →

🛋️

Interior Design

Paint, false ceiling, AC, kitchen

12 calculators →

📐

Architecture & Design

FAR/FSI, setbacks, staircase, bye-laws, NBC rules

11 calculators →

🔧

Plumbing & Electrical

Pipes, solar, wire gauge, MCB

8 calculators →

₹

Cost & Finance

Construction cost, EMI, stamp duty

10 calculators →

🌿

Landscaping & Outdoor

Garden, paving, turf, borewell

6 calculators →

♻️

Sustainability & Green

Embodied carbon, U-value, ECBC

5 calculators →

🗺️

Plot & Land

Area, unit conversion, feasibility, valuation

6 calculators →

📏

Architecture & Design

Ramp, plinth, room area, floor height, balcony

6 calculators →

🏠

Interior Finishes

Wallpaper, false ceiling, lighting, curtains, wardrobe

6 calculators →

📈

Real Estate Investment

Rental yield, ROI, profit, saleable area, feasibility

5 calculators →

Popular calculators

instant results · live

Construction & Civil

Brick Calculator

Bricks, cement, sand with door & window deductions

Length

Height

Thickness

Brick type

Mortar joint (mm)

Mortar mix

Wastage

🚪 Deductions

💰 Rates (₹)

Brick /1000

Cement /bag

Sand /cft

Bricks needed

—

Net bricks

—

Cement bags

—

Sand

—

🇮🇳 IS 1077 & IS 2212 standards

Construction & Civil

Concrete Mix Calculator

Cement, sand & aggregate for M10–M30 grades

Element

Grade

Length (m)

Width (m)

Depth (m)

Wet volume

—

Dry volume

—

Cement bags

—

Sand

—

🇮🇳 IS 456:2000

Wet = L×W×D · Dry = Wet×1.54
Cement bags = Dry×(1/sum)/0.0347
Sand = Dry×(s/sum)×35.31 cft

Flooring & Tiling

Tile Calculator

Tiles, boxes and estimated cost for any surface

Room length (m)

Room width (m)

Tile size

Wastage %

Price per tile (₹)

Tiles per box

Tiles needed

—

Boxes

—

Room area

—

Tile cost

—

Interior Design

Paint Calculator

Primer and paint litres for walls and ceiling

Room length (m)

Room width (m)

Ceiling height (m)

Openings

Coats

Brand coverage

Wall area

—

Paint needed

—

Primer needed

—

4L tins

—

🇮🇳 ~₹250–350/litre premium emulsion

Architecture & Design

Staircase Calculator

Riser, tread & run — NBC India compliance check

Floor-to-floor height (mm)

Preferred riser (mm)

Stair width (mm)

Usage

No. of risers

—

Actual riser

—

Tread depth

—

Total going

—

NBC 3385: 2R + T = 600–640mm
Tread = 620 − (2 × actual riser)

Cost & Finance

Home Loan EMI Calculator

Monthly EMI, total interest and repayment breakdown

Loan amount (₹)

Annual rate (%)

Tenure (years)

Monthly EMI

—

Total interest

—

Total payment

—

Interest ratio

—

🇮🇳 SBI current rate ~8.5–9.15% p.a.

EMI = P×r×(1+r)ⁿ / ((1+r)ⁿ−1)
r = annual/12 · n = years×12

Interior Design

AC Capacity Calculator

Correct tonnage by room size, climate and occupancy

Room length (ft)

Room width (ft)

Climate zone

Sun exposure

Occupants

Floor

Recommended

—

BTU/hr needed

—

Room area

—

BEE rating

—

🇮🇳 BEE star rating included

Plumbing & Electrical

Solar Panel Calculator

System size, panels and payback for your household

Monthly electricity bill (₹)

City / Peak sun hours

Tariff (₹/kWh)

Backup hours

System type

System size

—

Panels

—

Battery

—

Est. cost

—

🇮🇳 PM Surya Ghar subsidy up to ₹78,000

Advanced calculators

cement · sand · steel · construction cost

Construction & Civil

Cement Quantity Calculator

Bags for concrete, brickwork, plastering, flooring & columns — IS 456:2000

L (m)

W (m)

D (m)

Grade

L (m)

H (m)

Thickness

Mortar mix

Area (m²)

Thickness

Mix

Area (m²)

Thickness

Mix

No. members

Grade

Width (m)

Depth (m)

Length (m)

Bag size

Wastage (%)

Cement grade

Price per bag (₹)

Cement bags

—

Total weight

—

Material cost

—

Wastage added

—

🇮🇳 IS 456:2000 · IS 2250:1981

Construction & Civil

Sand Quantity Calculator

Sand in CFT, Brass & m³ for any construction work — IS 383

L (m)

W (m)

D (m)

Grade

L (m)

H (m)

T (m)

Mortar mix

Area (m²)

Thickness

Mix

Area (m²)

Bed thickness

Mix

Sand type

River Sand

₹60–110/CFT

M-Sand

₹40–80/CFT

Pit Sand

₹30–60/CFT

Sand rate (₹/CFT)

Wastage (%)

Sand (CFT)

—

In Brass

—

Volume (m³)

—

Est. cost

—

🇮🇳 IS 383 · 1 Brass = 100 CFT = 2.83 m³

Construction & Civil — Structural

Steel Reinforcement Calculator

TMT bar quantity for slabs, beams, columns, footings & staircases — IS 456:2000 · IS 1786 · D²/162 formula

Length Lx (m)

Width Ly (m)

Thickness (mm)

Main bar dia

Dist. bar dia

Main spacing (mm)

Dist. spacing (mm)

Cover (mm)

Wastage (%)

No. slabs

IS 456:2000 Cl.26.5.2 — Min steel 0.12% for HYSD bars
Weight = D²/162 kg/m · Lap = 40d · Hook = 9d/end

Enter dimensions and calculate

Span (m)

Width b (mm)

Depth D (mm)

Bottom bar dia

No. bottom bars

Top bar dia

No. top bars

Stirrup dia

Stirrup spacing

Cover (mm)

Wastage (%)

No. beams

IS 456:2000 Cl.26.5.1 — Min tension steel = 0.85bd/fy
Stirrup perimeter = 2(b+d) − 8×cover + 2×hooks(10d)

Enter dimensions and calculate

Type

Height (m)

Width b (mm)

Depth D (mm)

Bar dia

No. bars

Cover (mm)

Tie dia

Tie spacing

Tie legs

Wastage (%)

No. columns

IS 456:2000 Cl.26.5.3 — Min 0.8% · Max 6% of gross area
Tie spacing ≤ min(least dim, 16×bar dia, 300mm)

Enter dimensions and calculate

Length L (m)

Width B (m)

Depth D (mm)

Bar dia

Spacing (mm) both ways

Starter bar dia

No. starter bars

Cover (mm)

Wastage (%)

No. footings

IS 456:2000 Cl.34.5 — Cover ≥ 75mm (soil face)
Starter bar lap = 40d into column above

Enter dimensions and calculate

Flight width (m)

Tread (mm)

Riser (mm)

No. of steps

Waist slab (mm)

No. of flights

Main bar dia

Main spacing (mm)

Dist. bar dia

Dist. spacing

Wastage (%)

Sloping length = √(Going² + Rise²)
Extra 15–20% added for landing, hooks & laps

Enter dimensions and calculate

TMT bar grades — IS:1786

Fe 415

fy=415 N/mm²

Fe 500

Plot & Land Calculators

area · conversion · feasibility · layout · value

Plot & Land

Plot Area Calculator

Area in sq ft, sq m, guntas, cents & acres

Length (ft)

Width (ft)

Base (ft)

Height (ft)

Side A (ft)

Side B (ft)

Height (ft)

Side 1 (ft)

Side 2 (ft)

Side 3 (ft)

Side 4 (ft)

Irregular 4-sided plot split into 2 triangles — Heron's formula.

Sq Ft

—

Sq Metres

—

Guntas

—

Acres

—

Plot & Land

Land Unit Converter

Convert sq ft, sq m, acre, gunta, cent, hectare, bigha instantly

Value

From unit

Sq Ft

—

Sq Metres

—

Guntas

—

Cents

—

Acres

—

Hectares

—

Sq Yards

—

Bigha (RJ)

—

Plot & Land

Plot Feasibility Calculator

Check dimensions against BBMP / NBC minimum standards

Plot Width (ft)

Plot Depth (ft)

Authority

Use

Plot & Land

Layout Plot Calculator

Deduct roads, parks & amenities to find saleable plot area

Total layout area (acres)

Avg plot size (sq ft)

Roads % deduct

Parks/amenities %

Other deductions %

Land rate (₹/sq ft)

Saleable area

—

No. of plots

—

Total deductions

—

Est. layout value

—

RERA: Min 10% open space for layouts ≥ 1 acre

Plot & Land

Land Subdivision Calculator

Divide a large plot into equal sub-plots with road allocation

Total plot width (ft)

Total plot depth (ft)

Sub-plot width (ft)

Internal road width (ft)

Sub-division type

No. of sub-plots

—

Each plot (sq ft)

—

Road area (sq ft)

—

Total area (sq ft)

—

Plot & Land

Plot Value Calculator

Estimate land value with road, location & shape adjustments

Plot area (sq ft)

Base rate (₹/sq ft)

Road facing

Road width

Plot shape

Development

Estimated value

—

Per sq ft

—

Low estimate

—

High estimate

—

💡 Add 5–8% registration & stamp duty to purchase cost

Architecture & Design Tools

ramp · plinth · rooms · balcony · floor height

Architecture & Design

Ramp Slope Calculator

Rise, run, angle & gradient — NBC & accessibility compliance

Ramp type

Vertical rise (mm)

Ramp length

—

Gradient

—

Slope angle

—

Compliance

—

NBC: Accessible ramps ≤ 1:12 (8.33%) · Parking ≤ 1:7

Architecture & Design

Plinth Area Calculator

Total plinth, RERA carpet & super built-up area across floors

Floors — enter Length × Width (metres) + Balcony area (m²)

Common areas %

Loading factor

Total plinth

—

RERA carpet

—

Super built-up

—

Total balcony

—

RERA: Carpet = Plinth − walls − common areas

Architecture & Design

Room Area Calculator

Calculate and total area for multiple rooms in your house

Rooms — enter Length × Width in metres

Total area

—

In sq ft

—

Architecture & Design

Balcony Area Calculator

RERA carpet area inclusion & glazing estimate

Balconies — enter Length × Width in metres

RERA inclusion

Total balcony

—

RERA included

—

Est. glazing area

—

No. of balconies

—

RERA 2016: Max 50% of balcony included in carpet area

Architecture & Design

Floor Height Calculator

Clear height check against NBC 2016 minimums

Building use

Floor-to-floor height (mm)

Slab thickness (mm)

False ceiling drop (mm)

FFL thickness (mm)

Clear height

—

NBC minimum

—

Status

—

Surplus / deficit

—

NBC 2016: Residential ≥ 2750mm · Commercial ≥ 3000mm · Basement ≥ 2400mm

Interior Design Calculators

wallpaper · ceiling · lighting · curtains · wardrobe · kitchen

Interior Design

Wallpaper Roll Calculator

Rolls needed with pattern repeat, wastage & openings

Room length (m)

Room width (m)

Ceiling height (m)

Openings

Roll width (m)

Roll length (m)

Pattern repeat (cm)

Rolls needed

—

Wall area

—

Strips needed

—

Buy (incl. spare)

—

Interior Design

False Ceiling Area Calculator

Gypsum / POP false ceiling material & cost estimate

Room length (m)

Room width (m)

Ceiling design

Material

Rate (₹/sq ft)

Light cut-outs

Fan cut-outs

Ceiling area (m²)

—

In sq ft

—

Est. cost

—

Total cut-outs

—

Interior Design

Lighting Requirement Calculator

Lux levels, total lumens & number of fixtures by room type

Room length (m)

Room width (m)

Room type

Fixture efficacy

Fixture wattage (W)

Lux required

—

Total lumens

—

No. of fixtures

—

Total wattage

—

BEE: LED fixtures use ~60% less energy than CFL

Interior Design

Curtain Length Calculator

Fabric needed with pleating, lining & hem allowances

Window width (cm)

Drop length (cm)

Pleat fullness

Lining

Hem allowance (cm)

Header allowance (cm)

No. of panels

Width per panel

—

Cut length / panel

—

Total fabric (m)

—

Lining fabric (m)

—

Interior Design

Wardrobe Dimension Calculator

Doors, hanging rails, shelves & capacity by size

Width (mm)

Height (mm)

Depth (mm)

Door type

Configuration

No. of doors

—

Hanging rail (m)

—

No. of shelves

—

Est. capacity

—

Interior Design

Modular Kitchen Cost Calculator

Estimate cost by size, layout, material & finish

Kitchen length (ft)

Layout

Carcass material

Shutter finish

Countertop

Appliances

Base cabinets

—

Wall cabinets

—

Total (incl. counter)

—

Per running ft

—

💡 GST 18% extra · Installation ~15% of material cost

Real Estate Investment Calculators

rental yield · ROI · profit · saleable area · feasibility

Real Estate Investment

Rental Yield Calculator

Gross & net rental yield with vacancy & expenses

Property value (₹)

Monthly rent (₹)

Vacancy months/yr

Maintenance (₹/mo)

Society charges (₹/mo)

Property tax (₹/yr)

Gross yield

—

Net yield

—

Annual net income

—

Payback period

—

India avg rental yield: 2–4% · Good: 4–6%+

Real Estate Investment

Property ROI Calculator

Total return including rental income & capital appreciation

Purchase price (₹)

Registration & costs (₹)

Monthly rent (₹)

Annual appreciation %

Annual expenses (₹)

Hold period (years)

Total investment

—

Property value at exit

—

Total ROI

—

Annualized return

—

Real Estate Investment

Construction Profit Calculator

Developer profit margin — land + construction vs revenue

Land cost (₹)

Plot area (sq ft)

FSI / FAR

Construction cost (₹/sqft)

Other costs (₹)

Sale price (₹/sqft)

Saleable % of BUA

Total BUA

—

Total project cost

—

Revenue

—

Profit / Loss

—

Real Estate Investment

Saleable Area Calculator

RERA carpet area from super built-up area & loading factor

Super built-up area (sq ft)

RERA carpet area (sq ft)

Loading factor

RERA carpet area

—

Built-up area

—

Super built-up

—

Loading %

—

RERA 2016: Builders must quote price on carpet area basis

Real Estate Investment — Advanced

Apartment Feasibility Calculator

Complete project feasibility: land, construction, sales & profit analysis

01 — Land details

Plot area (sq ft)

FSI / FAR

Land cost (₹/sqft)

02 — Construction

Construction cost (₹/sqft)

Saleable area %

Approval & legal (₹)

Marketing & misc (₹)

03 — Sales

Sale price (₹/sqft SBU)

Loading factor

Enter project details to see feasibility

Building bye-laws calculator

BBMP · BDA · Bangalore · RMP 2031

Architecture & Design — Bangalore

Building Setback Calculator

Setbacks, FAR/FSI, height limits, parking norms, rainwater harvesting & BBMP approval checklist — BBMP Bye-Laws 2017

Plot Width (ft)

Plot Depth (ft)

Road Width (ft)

Authority

Building use

Corner plot

Quick reference — common plot sizes (BBMP residential)

Plot (ft)	Area (m²)	Front	Rear	Left	Right	FAR	Max cov.

In Bangalore, the maximum permissible building height is governed by the abutting road width. Fire NOC from DFES is mandatory for buildings above 15 metres.

Road Width	Max Height	Floors Allowed	Key Requirement
< 9 m (< ~30 ft)	7 m	G + 1	Standard approval
9–12 m (30–40 ft)	11.5 m	G + 2	Standard approval
12–18 m (40–60 ft)	14 m	G + 3	Standard approval
18–24 m (60–80 ft)	17.5 m	G + 4	Standard approval
24–30 m (80–100 ft)	21 m	G + 5	Standard approval
> 30 m (> 100 ft)	No cap (per FAR)	High-rise	Fire NOC + AAI if near airport

FAR / FSI by plot size (residential)

Multiply plot area × FAR to get maximum total floor area across all floors.

≤ 360 m²

1.75

FAR

75% max cov.

361–1000 m²

2.25

FAR

65% max cov.

1001–2000 m²

2.50

FAR

60% max cov.

2001–4000 m²

3.00

FAR

55% max cov.

Example: A 30×40 ft plot = 111 m². FAR = 1.75. Max total floor area = 111 × 1.75 = 194 m² (2,090 sq ft) across all floors.

Key definitions

Setback

Mandatory open space between the building and plot boundary. Ensures ventilation, access and safety.

FAR / FSI

Floor Area Ratio = Total floor area ÷ Plot area. Controls density of development on a plot.

Ground Coverage

% of plot covered by building footprint at ground level. Limited to preserve open space.

Carpet Area

Usable floor area within walls, excluding wall thickness and balcony. ~85–90% of built-up area.

Parking provisions are mandatory and must be within the plot boundary. Basement parking is allowed and encouraged for plots above 200 m².

🏠 Residential parking norms

Dwelling Unit Size	Car Spaces	Two-Wheeler	Notes
< 75 m² (< ~800 sq ft)	Not mandatory	1	Small units — 1 bike slot required
75–150 m² (800–1,600 sq ft)	1	1	Standard 1 BHK / 2 BHK
> 150 m² (> 1,600 sq ft)	2	2	3 BHK / 4 BHK / villas

🏢 Commercial parking norms

Use Type	Norm	Notes
Offices / IT / BPO	1 car per 50 m² floor area	Plus 2 two-wheelers per car slot
Retail / Shops	1 car per 50 m²	Loading/unloading zone additional
Hotels	1 car per 2 rooms	Plus visitor parking
Hospitals	1 car per 5 beds	Ambulance bay separate
Theatres / Auditorium	1 car per 10 seats	Overflow on adjacent road not permitted

Parking dimensions & design rules

Car Parking Space

2.5 × 5.0 m

~12.5 m² per slot

Two-Wheeler Space

1.0 × 2.0 m

~2 m² per slot

Aisle Width (2-way)

6.0 m min.

For manoeuvring

Aisle Width (1-way)

4.5 m min.

One-direction flow

Headroom (Basement)

2.2 m min.

Clear ceiling height

Ramp Width

3.6 m (1-way)

5.4 m for 2-way

BBMP mandates RWH systems for all buildings above 2,400 sq ft plot area. Non-compliance results in refusal of Occupancy Certificate or property tax surcharge.

Recommended

< 2,400 sq ft

Optional but encouraged. Install for BWSSB water savings and property value.

Mandatory

2,400–4,000 sq ft

Sump + recharge pit. Submit plan with building licence application.

Mandatory+

> 4,000 sq ft

Full RWH system + percolation well + BWSSB compliance certificate required.

RWH system components

🏠

Rooftop Collection

All terraces must have outlets connected to the RWH system. Slope min. 1:100.

🚿

First Flush Diverter

First 2–3 mm of rain diverted before harvesting begins to remove pollutants.

💧

Storage Tank / Sump

Capacity: Roof area (m²) × 20–25 mm rainfall. Min. 5,000 litres for plots under 4,000 sq ft.

🌱

Percolation Pit

For plots > 4,000 sq ft. Pit size: 1m × 1m × 2m min. with gravel fill for groundwater recharge.

☀️ Solar water heating mandatory for plots above 600 m² (6,458 sq ft). Min. 1 m² panel area per 100 L of daily hot water requirement. BESCOM offers incentives.

📌 How to use: Expand each phase and tick off items as you complete them. Use alongside your architect's guidance.

Important contacts

BBMP (Building Plan Approval)

bbmp.gov.in — NAMBARA Portal

Online submission of building plans

BDA

bda.gov.in

For BDA-layout plots

DFES (Fire NOC)

kfes.karnataka.gov.in

For buildings > 15m height

BWSSB

bwssb.gov.in

Water & sewerage connection

BESCOM

bescom.org

Electrical connection & solar incentives

Airport Authority

aai.aero

Height clearance if within 20 km of airport

Why PlotCalc

precision · transparency · free

PlotCalc is a free toolkit for construction professionals, architects, interior designers, and homeowners. Every calculator uses industry-standard formulas — IS 456, IS 1786, IS 383, NBC standards — with India-specific defaults.

All calculations happen entirely in your browser. No account needed. No paywalls. Both metric and imperial units on every calculator.

The name PlotCalc comes from where every Indian construction project starts — the plot. From that first measurement to the finished structure, we have every calculation covered.

🇮🇳

India-first data

City-wise rates, NBC standards, FSI/FAR rules, BEE ratings and state stamp duty built in.

📐

IS code compliant

Steel calculations reference IS 456:2000, IS 1786, SP 16. Staircase checks NBC 3385.

🌍

Global unit support

Switch metric ↔ imperial in one tap. Brick sizes for India, UK, and US standards.

⚡

Instant & offline-ready

Everything runs in your browser — works offline once loaded. No server calls.

From plot to finish,every calculation.

Browse by category

Popular calculators

Advanced calculators

Plot & Land Calculators

Architecture & Design Tools

Interior Design Calculators

Real Estate Investment Calculators

Building bye-laws calculator

Why PlotCalc

From plot to finish,
every calculation.