Cement Quantity Calculator – How Many Bags of Cement Do You Need?
Free Cement Quantity Calculator — enter slab dimensions and mix ratio to find how many bags of cement, sand and aggregate you need for any construction project.
Calculator Blog: Guides, Tips and How-To Articles
Practical guides and worked examples for our free online calculators, covering finance, health, maths, home projects and everyday conversions.
GST Reverse Calculator India – Find Base Price from GST-Inclusive Amount
Free GST Reverse Calculator for India. Enter the GST-inclusive amount and GST rate to instantly find the original base price and GST amount paid.
Waist to Height Ratio Calculator – WHtR Health Risk Guide 2026
Free Waist to Height Ratio Calculator. Enter your waist and height to find your WHtR score and health risk level — a better predictor than BMI.
Lean Body Mass Calculator – Find Your LBM (Boer & James Formula)
Free Lean Body Mass Calculator using Boer and James formulas. Enter your weight, height and gender to find your LBM and fat-free mass instantly.
Hectares to Acres Calculator – Convert ha to Acres Instantly
Free Hectares to Acres Calculator — convert ha to acres or acres to hectares instantly. Includes formula, conversion table and examples for land measurement.
Roman Numeral Converter – Numbers to Roman Numerals & Back
Free Roman Numeral Converter — instantly convert numbers to Roman numerals and Roman numerals to numbers. Includes a full chart and conversion rules.
Significant Figures Calculator – Round to Sig Figs Instantly
Free Significant Figures Calculator — round any number to the correct number of sig figs instantly. Includes rules, examples and a step-by-step guide.
Molarity Calculator – Calculate Moles, Volume and Concentration
Free Molarity Calculator — enter moles and volume to calculate concentration in mol/L instantly. Includes formula, examples and a reference table.
Ethanol Dilution Calculator – Mix Ethanol to Any Concentration
Free online Ethanol Dilution Calculator. Enter stock concentration, desired concentration, and final volume to instantly calculate how much ethanol and water to mix.
Leave Encashment Calculator – Calculate Your Leave Encashment (2026)
Calculate your leave encashment amount instantly with our free calculator. Know the formula, tax exemption limit, and rules for 2026.