What mix grades are supported?

M5, M7.5, M10, M15, M20, M25, M30, M35 and M40 concrete grades. Each grade gives cement:sand:aggregate ratios and water-cement ratio.

Is it useful for home construction?

Yes. Commonly used for calculating material quantities for columns, beams, slabs, footings and flooring in residential construction.

Does it calculate material quantities?

Yes. Enter volume or area and the calculator gives the quantity of cement bags, sand (cubic feet) and aggregate (cubic feet) required.

🏗️ Concrete Mix Design Calculator

Calculate cement, sand, aggregate & water quantities per IS 10262:2019 & IS 456:2000 | M15 to M40 grade

Quick concrete mix ratios as per IS 456:2000 Table 9. Best for small works, footings, slabs up to M25.

Select Concrete Grade

Volume of Concrete Required

m³

Exposure Condition

Cement Density (kg/m³)

Sand Density (kg/m³)

Aggregate Density (kg/m³)

⚠️ Please enter valid values.

📊 Mix Results

Mix Proportion Visualisation —

Cement

Sand (FA)

Aggregate (CA)

Detailed mix design as per IS 10262:2019. For structural concrete, RCC works, bridges and all M25+ grades.

Grade of Concrete

Type of Cement

Volume Required (m³)

Max Aggregate Size (mm)

Workability (Slump mm)

Exposure Condition (IS 456:2000)

Zone of Fine Aggregate (Sand)

⚠️ Please check input values.

📊 Design Mix Results

Proportion by Weight —

Cement

Water

Fine Aggregate

Coarse Aggregate

Find how many bags of cement are needed for any volume, or reverse-calculate volume from bags.

Grade of Concrete

Volume of Concrete (m³)

Bag Size

Wastage %

📊 Material Required

Concrete Mix Design Calculator — For Indian Civil Engineers

This free online concrete mix design calculator helps civil engineers, site supervisors, contractors and students calculate the exact quantities of cement, sand (fine aggregate), coarse aggregate, and water required for any grade of concrete — from M15 to M50 — as per IS 10262:2019 and IS 456:2000.

What is Concrete Mix Design?

Concrete mix design is the process of determining the right proportions of cement, water, fine aggregate (sand) and coarse aggregate to achieve the desired workability, strength, and durability. In India, all RCC structures must follow IS 10262:2019 for design mix and IS 456:2000 for nominal mix guidelines.

Nominal Mix vs Design Mix

Nominal Mix (IS 456:2000): Uses fixed volumetric ratios like 1:2:4 (M15) or 1:1.5:3 (M20). Suitable for small, non-structural work. Easy to implement at site without lab testing.

Design Mix (IS 10262:2019): Scientifically determined proportions based on water-cement ratio, target mean strength, aggregate grading and exposure conditions. Mandatory for M25 and above structural concrete.

How to Use This Calculator

Select the grade of concrete required (M15, M20, M25, M30 etc.)
Enter the volume of concrete needed in cubic metres
Choose exposure condition as per IS 456:2000
Click Calculate to get cement, sand, aggregate & water quantities
Use Bags to Volume tab to find exact number of cement bags required

Concrete Mix Ratio Quick Reference (IS 456:2000)

Grade	Ratio (C:S:CA)	Max W/C	Min Cement (kg/m³)	Use Case
M15	1:2:4	0.60	250	PCC, levelling courses
M20	1:1.5:3	0.55	300	Slabs, beams, columns
M25	1:1:2	0.50	320	Bridges, water tanks
M30	Design Mix	0.45	340	High-rise columns
M40	Design Mix	0.40	380	Prestressed, flyovers

Why Water-Cement Ratio Matters

The water-cement ratio (W/C) is the single most important factor controlling concrete strength. As per Abrams' law, lower W/C = higher strength. IS 456:2000 specifies maximum W/C ratios based on exposure conditions — 0.60 for mild to 0.40 for extreme exposure.

Benefits of Using This Tool

Instant calculations — no manual computation errors
Follows IS 10262:2019 and IS 456:2000 Indian standards
Results in both kg and CFT (cubic feet) for site convenience
Accounts for bulking factor (1.54) and site wastage
Works on mobile — useful directly at construction sites