Free Online Calculators
Accurate calculators for everyday maths, health and personal finance. Each calculator explains the formula it uses so you can check the result.
Calculators (10)
Percentage Calculator
Find X% of a number, percentage change, percentage difference and more, with the working shown.Age Calculator
Exact age in years, months and days, plus totals and a countdown to the next birthday.Date Difference Calculator
Days, weeks, months and business days between two dates, or add and subtract days from a date.BMI Calculator
Body Mass Index in metric or imperial units with WHO adult categories and a healthy weight range.Loan EMI Calculator
Monthly EMI, total interest and a full amortisation schedule you can download as CSV.GST Calculator
Add or remove GST from an amount and split it into CGST + SGST or IGST.Compound Interest Calculator
Future value with any compounding frequency, optional monthly contributions and a yearly growth table.Simple Interest Calculator
Simple interest and total amount, or solve for the principal, rate or time.Unit Converter
Convert length, mass, temperature, area, volume, speed, time, storage, pressure and energy units.Time Calculator
Add and subtract hours, minutes and seconds, measure time between clock times and convert decimal hours.
About these calculators
Calculators update instantly as you change the inputs and show the working behind the answer — the formula, the intermediate values and, for loans and investments, a full period-by-period schedule.
Financial results are estimates based on the figures you enter. Lenders may calculate interest differently (for example with fees, daily interest or rounding rules), so always confirm important numbers with your bank or adviser.
Frequently asked questions
Are the financial calculators accurate?
They use standard formulas (such as the reducing-balance EMI formula) with full floating-point precision and round only for display. Real loan products may include fees or different compounding rules.
Do you store the numbers I enter?
No. Calculations happen in your browser and the values are not stored or transmitted.