Calculators
Fresh Concrete
Mix Design & Batching
Strength & Durability
Structural & Sustainability
Concrete Evaporation Rate Calculator

Calculate evaporation rate per ACI 305.1-14 to assess plastic shrinkage cracking risk during hot weather concreting.

0°C55°C
5°C65°C
10%100%
0 km/h50 km/h
Result
kg/m²/h
Risk Level:
Low Risk

Evaporation rate is within acceptable limits. Standard curing practices should be sufficient.

Moderate Risk

Consider using evaporation retarders, windbreaks, or fogging. Monitor conditions closely.

High Risk!

Plastic shrinkage cracking likely! Use evaporation reducers, windbreaks, sunshades, and consider cooler conditions.

Reference: ACI 305.1-14, ACI 308R-16

Water-Cement Ratio Calculator

Calculate the water-cement ratio for your concrete mix design.

Result

Water-Cement Ratio

Typical Values:
Normal: 0.45-0.60
High Strength: 0.35-0.45
Waterproof: 0.40-0.50
Max (IS 456): 0.55
Concrete Yield Calculator

Calculate actual yield and compare with theoretical yield to assess batching accuracy.

Results
Actual Yield:
Difference:
Yield %:

Good yield! Mix proportions are accurate. Yield is slightly low. Check batching accuracy. Low yield detected! Review mix design and batching.

Unit Weight Calculator

Calculate fresh concrete unit weight from field measurements.

Result

kg/m³

Typical Unit Weights:
Normal weight concrete 2300-2500 kg/m³
Lightweight concrete < 1900 kg/m³
Heavyweight concrete > 2600 kg/m³

Within normal range for standard concrete. Below normal range. May indicate lightweight mix or air entrainment. Above normal range. May indicate heavy aggregate or low air content.

Concrete Volume Calculator

Calculate concrete volume required for slabs, columns, beams, and footings. Includes wastage allowance.

0%15%
Results

m³ (Total with wastage)

Net Volume (per element):
Quantity:
Sub-total:
Wastage (%):
Order Quantity:

Enter dimensions and click calculate

Aggregate Moisture Correction

Adjust batch weights for free moisture and absorption of aggregates per IS 2386 / ASTM C566.

Fine Aggregate (Sand)
Coarse Aggregate
Design Water
Corrected Batch Weights
Fine Aggregate (corrected):
Coarse Aggregate (corrected):
FA free moisture:
CA free moisture:
Total water adjustment:
Adjusted Water:

Free moisture = Total moisture - Absorption

Enter aggregate data and click calculate

Reference: IS 2386, ASTM C566, IS 10262

Cube-Cylinder Strength Conversion

Convert between 150mm cube and 150x300mm cylinder compressive strength per IS 516 / ASTM C39.

Results

MPa

Input:
Conversion Factor:
Flexural Strength (est.):
Split Tensile (est.):
Modulus of Elasticity:

Enter strength and click convert

Flexural = 0.7√fck (IS 456), E = 5000√fck (IS 456)

Disclaimer: Conversions are based on empirical correlations and are indicative only. Actual values depend on aggregate type, mix proportions, and curing conditions. Use laboratory test results for design and acceptance decisions.
Fresh Concrete Temperature

Predict fresh concrete temperature from ingredient temperatures per ACI 305R-20 / IS 7861.

Result
°C
Acceptable

Concrete temperature is within ideal range for placement.

Caution

Consider using chilled water or ice to reduce temperature. Monitor closely.

Too Hot!

Exceeds IS 7861 / ACI 305R limit. Use ice, chilled water, shaded aggregates, or night casting.

Cold Weather

Below 10°C. Follow cold weather concreting practices per IS 7861 Part 2 / ACI 306R.

Enter ingredient weights and temperatures

Reference: ACI 305R-20, IS 7861 (Part 1 & 2)

Curing Period Calculator

Determine minimum curing period based on cement type, ambient temperature, and exposure per IS 456 / ACI 308R.

5°C50°C
Curing Recommendation

Minimum Days

Recommended Period:
Curing Method:
Est. 7-day Strength:
Est. 28-day Strength:
Hot weather: Apply curing compound immediately after finishing. Keep surfaces moist continuously.
Cold weather: Protect concrete from freezing. Maintain min 10°C for curing period. Use insulating blankets.

Select parameters and click calculate

Reference: IS 456:2000, IS 7861, ACI 308R-16

Disclaimer: Curing period recommendations are general guidelines based on code provisions. Actual curing requirements depend on cement type, ambient conditions, structural element type, and project specifications. Always follow project-specific curing protocols.
Rebound Hammer Correlation

Estimate indicative compressive strength from Schmidt rebound hammer readings per IS 516: Part 5/Sec 4.

Enter comma-separated values. Outliers beyond ±6 from median are auto-discarded per IS 516: Part 5/Sec 4.

Results

MPa (Estimated)

Valid Readings:
Average Rebound No.:
Orientation Correction:
Rebound hammer gives indicative strength only. Accuracy ±25%. Core testing recommended for critical decisions.

Enter rebound readings and click estimate

Reference: IS 516: Part 5/Sec 4

Disclaimer: This is an indicative tool only. Results are approximate and should not be used as a substitute for laboratory testing. Actual strength must be determined by destructive testing (cube/cylinder) as per IS 516. ConcreteInfo accepts no liability for decisions based on these estimates.
Carbonation Depth Estimator

Predict carbonation depth over time using the √t model for durability and service life assessment.

1 yr100 yrs
Results

mm carbonation depth at years

Carbonation Coefficient (k):
Cover Depth:
Time to reach rebar:
Corrosion Risk! Carbonation front will reach reinforcement. Consider protective coatings or repair.
Reinforcement is safe from carbonation-induced corrosion for the predicted period.

Select parameters and click estimate

Model: d = k√t (Tuutti 1982)

Disclaimer: Carbonation depth is a theoretical estimate based on simplified models. Actual carbonation rates depend on concrete quality, w/c ratio, curing, exposure, and CO₂ concentration. On-site phenolphthalein testing is required for actual assessment.
Concrete Cost Estimator

Estimate per m³ cost of concrete based on material rates and mix proportions.

Mix Proportions (kg/m³)
Material Rates (¤/unit)
Cost Breakdown (per m³)

per m³

Total Material Cost:

Enter mix proportions and rates

* Material cost only. Excludes labour, transport, pumping, testing.

Disclaimer: Cost estimates are indicative and based on user-entered rates. Actual costs vary by location, supplier, quantity, and market conditions. This tool is for preliminary budgeting only.
Steel Reinforcement Calculator

Calculate rebar weight, number of bars, and lap/development length per IS 1786 / IS 456.

Results

kg total weight

Unit Weight:
Total Length:
Cross-section Area:
Development Length (Ld):
Lap Length (tension):

Select bar size and enter details

Reference: IS 1786, IS 456 Cl. 26.2

Slump Retention Estimator

Estimate slump loss over time based on temperature, initial slump, and admixture dosage.

50 mm220 mm
15°C50°C
Slump Retention Profile
Place concrete before slump drops below workability threshold. Re-dosing admixture on-site should follow supplier guidelines.

Set parameters and click estimate

* Estimates only. Actual retention depends on materials and mix.

Disclaimer: Slump retention is an indicative estimate based on simplified models. Actual slump loss depends on cement type, admixture dosage, temperature, mix proportions, and transport time. Field trials are essential for validation.
Maturity Method (Nurse-Saul)

Estimate in-place concrete strength using the temperature-time maturity factor per ASTM C1074 / IS 9013.

Typically -10°C for OPC, -11°C for PPC

Enter comma-separated average temperatures for each time interval.

Maturity Results

°C-hours (Maturity Index)

Total Duration:
Equivalent Age at 20°C:
Estimated Strength:
% of Target Strength:

Enter temperature history and click calculate

Reference: ASTM C1074, Nurse-Saul Method

Disclaimer: Maturity-based strength is an indicative estimate. The strength-maturity relationship must be calibrated for each specific mix design through laboratory testing. Not a substitute for actual cube/cylinder testing for acceptance.
Concrete Pump Pressure

Estimate pumping pressure based on pipeline configuration, concrete properties, and output rate.

Pump Requirements

bar (Total Pressure)

Horizontal friction loss:
Vertical pressure (static):
Bends equivalent length:
Effective total length:
Recommended Pump:
Add 20-30% safety margin. Actual pressure depends on aggregate shape, pipeline condition, and concrete mix.

Enter pipeline details and click estimate

Disclaimer: Pump pressure is an indicative estimate based on simplified empirical formulae. Actual pressure depends on concrete mix, slump, pipeline condition, ambient temperature, and pump type. Consult pump manufacturer specifications for operational decisions.
CO2 Savings from SCM Replacement

Calculate carbon footprint reduction by replacing OPC with supplementary cementitious materials (fly ash, GGBS, silica fume, etc.).

Base Mix (100% OPC)
SCM Replacement
%
%
%
%
Total SCM replacement exceeds 100%!
Carbon Impact Analysis

CO2 Reduction

OPC in base mix:
OPC after SCM replacement:
Baseline CO2 (per m³):
Blended CO2 (per m³):
Savings per m³:
Project Total Savings:
Equivalent to trees absorbing CO2 for one year

Enter mix details and SCM percentages

CO2 factors: OPC 0.93, Fly Ash 0.004, GGBS 0.07, SF 0.014, MK 0.33 t/t

Disclaimer: CO₂ emission factors are indicative averages and vary by manufacturer, region, and production process. This tool provides approximate estimates for comparison purposes only. Refer to EPD (Environmental Product Declarations) for accurate emission data.
Reinforcement Rolling Margin

Check if rebar actual weight per metre complies with IS 1786 mass tolerance limits. Rolling margin = deviation of actual weight from theoretical weight.

Results

Rolling Margin

Theoretical Wt:
Actual Wt:
Deviation:
IS 1786 Tolerance:
Compliance:
Negative margin. Bar is lighter than nominal. Within tolerance but reduced cross-section area affects structural capacity.
Good quality. Weight deviation well within acceptable limits.
Non-compliant! Weight deviation exceeds IS 1786 tolerance. Reject the lot or request re-testing per IS 1608.

Enter bar data and click check

Reference: IS 1786:2008 Cl. 11.2

Disclaimer: Rolling margin check is indicative based on single-bar measurement. Formal acceptance/rejection of rebar lots must follow IS 1786 sampling procedures with certified weighing equipment. This tool does not replace laboratory testing.

Why Use These Calculators?

Professional-grade calculations based on industry standards

Code Compliant

Calculations based on ACI, IS, and ASTM standards for accurate results.

Instant Results

Get immediate calculations with real-time updates as you adjust parameters.

Mobile Friendly

Use on-site from any device. Works great on smartphones and tablets.

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