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See all- 4 calculatorsHealthBMI, Calorie, Body Fat, Ideal Weight
- 4 calculatorsEducationCGPA, GPA, Grade, Marks to Percentage
- 4 calculatorsFinanceLoan EMI, Compound Interest, Mortgage, Tip
- 3 calculatorsMathPercentage, Average, Fraction
- 3 calculatorsDate & TimeAge, Date Difference, Countdown
- 1 calculatorConversionLength, weight, temperature, area, volume, speed
Most popular calculators
- BMI CalculatorBody mass index from height and weight, metric or imperial.70 kg, 175 cm70 kg, 175 cm22.9Normal weight
- Age CalculatorExact age in years, months and days from any date of birth.Born 12 Mar 1995, on 1 Oct 2026Born 12 Mar 1995, on 1 Oct 202631 y 6 m 19 d
- CGPA CalculatorSemester and cumulative GPA on 4.0 and 10-point scales.GPAs 3.4, 3.6, 3.8 (equal credits)GPAs 3.4, 3.6, 3.8 (equal credits)3.60/ 4.0
- Loan EMI CalculatorMonthly instalment, total interest and an amortisation table.500,000 at 9% for 5 years500,000 at 9% for 5 years10,379/ month
- Percentage CalculatorWhat is X% of Y, percent change, and percent difference.15% of 24015% of 24036
- Calorie CalculatorDaily maintenance calories and targets for losing or gaining.Man, 30, 70 kg, 175 cm, moderately activeMan, 30, 70 kg, 175 cm, moderately active2,556kcal / day
- Date DifferenceDays, weeks and working days between two dates.1 Jan → 31 Dec 20261 Jan → 31 Dec 2026364days
- Unit ConverterLength, weight, temperature, area, volume and speed.5 kilometres in miles5 kilometres in miles3.11mi
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The working behind it.
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- Built for phones firstBig inputs, numeric keyboards, results on a single screen.
22.9
How it’s worked out
BMI = weight ÷ height²
= 70 ÷ (1.75 × 1.75)
= 70 ÷ 3.0625 = 22.9
Healthy range for 175 cm: 56.7 – 76.6 kg
Learn how they work
- Health guideHow the BMI calculator worksBody mass index from height and weight, metric or imperial.Read guide →
- Finance guideHow the Loan EMI calculator worksMonthly instalment, total interest and an amortisation table.Read guide →
- Education guideHow the CGPA calculator worksSemester and cumulative GPA on 4.0 and 10-point scales.Read guide →
Questions, answered
Are the calculators really free?
Yes. Every calculator is free to use, with no sign-up and no limits.
Do you store the numbers I enter?
No. Calculations run in your browser. We only remember small preferences on your own device, such as your unit system and which calculators you opened recently.
How accurate are the results?
Each calculator uses a standard, published formula and shows it alongside the result, so you can check the working.
Do they work on my phone?
Yes. They're designed for phones first, with numeric keyboards and results that fit on one screen.
Can I request a new calculator?
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