Calculators tools
Calculators for everyday tasks: work out a discount, remove VAT from a price, solve a rule of three, get your grade average or add up the hours you worked this week. They show the working as well as the answer, so you can check it.
Percentage calculator
Discounts, increases, percent change and percent of a number.
VAT calculator
Add or remove VAT / sales tax from a price with a clear breakdown.
Finance calculator
Compound interest, loans, amortization and rate conversion.
Date calculator
Days between dates, business days, exact age and add days.
- New
BMI calculator
Body mass index with the WHO classification.
- New
Rule of three
Direct and inverse proportion solver with the working shown.
- New
Grade average calculator
Simple or weighted grade average and the score you still need.
- New
Hours calculator
Add up hours worked, add or subtract times and get your pay.