How to calculate this
The same math. The standard your country actually uses.
Drop-in calculators with cited formulas. Twelve languages — each with local defaults you can override.
Browse by category or open a featured tool. Every calculator page cites its formula, shows clear steps, and lets you switch the regional standard — GPA maps, tax rates, BMI cutoffs, and more.
30 tools · 12 languages · taxes for every country
Most used here
Built around local rules — change the standard any time.
- GPA calculatorQuality points ÷ credits with US, India CGPA, German, UK, Japan, Spain, 10-point, or custom grade maps.Open a calculator
- Final grade calculatorRearrange weighted course math to see what you need on the final for a target overall grade.Open a calculator
- GPA needed calculatorSolve for the average still required on remaining credits to reach your target cumulative GPA.Open a calculator
- Grade calculatorCategory weights × scores → course percent. Leave unfinished categories out or zero their weight.Open a calculator
- World tax calculatorHeadline VAT/GST/sales tax for countries and many sub-national regions — or type any custom percent and apply it.Open a calculator
All categories
GPA and grade tools with regional maps — US 4.0, India CGPA, German marks, ECTS letters, finals, and weighted averages you can switch anytime.
Body measures with switchable WHO, Asian, and clinic cutoffs — BMI screening plus BMR/TDEE calorie estimates and educational IQ percentile tools.
Loans, EMI, mortgage, tax, VAT/GST, FX, tips, and compound growth with local conventions you can override on every page.
- Compound interest calculator
- EMI calculator
- World tax calculator
- Currency converter
- Income tax calculator
- GST calculator
- Loan calculator
- VAT calculator
- Mortgage calculator
- Retirement calculator
- Investment calculator
- Tip calculator
- Salary calculator: gross to net by country
- Salary Converter
- Operating lease calculator
- Finance lease calculator
- IRA calculator
- Discount calculator
- Markup calculator
- NPV calculator (net present value)
Percentage of / change / reverse plus mean, median, mode, and standard deviation — free math helpers for study and everyday work.
- Random Number Generator
- Password Generator: Random or Memorable
- Percentage calculator
- Ratio Calculator
- Slope Calculator
- Area converter
- Length converter
- Temperature converter
- Volume converter
- Weight converter
- Statistics calculator
- Speed converter
- Power converter (kW, hp, PS)
- Combination and Permutation Calculator
- Fraction calculator
- Mean, median and mode calculator
- Midpoint calculator
- Paint calculator
- Volume calculator
Exact age, date differences, and timezone or city conversions — including IST, JST, CET and other IANA zones with DST-aware offsets.
Coordinates finder, distance between two points and map tools: GPS latitude and longitude, reverse geocoding and as-the-crow-flies distances in km or miles.
Estimate daily and yearly solar kWh from system size and regional peak sun hours — Germany, India, Japan, US, Australia defaults you can override.
Calculate This · 74 Browse