Calculators

What is X% of Y, X is what % of Y, and percentage change between numbers.

Calculate your grade point average on the 4.0 scale from courses and credits.

Calculate your weighted grade from assignment scores and their weights, with the letter grade.

Trig, logs, powers, roots, and factorials — a full scientific calculator in your browser.

Your exact age in years, months, days — and the difference between two dates.

Find your Body Mass Index and weight category — metric or imperial.

Tip, total, and per-person split for any bill.

Sale price, savings, and final total with sales tax.

Add sales tax to a price or work backwards from a tax-included total.

Monthly EMI payment, total interest, and total cost of a loan.

See how savings grow with compound interest and regular contributions over time.

Estimate your monthly mortgage payment — principal, interest, tax, and insurance.

Elapsed time between two dates and times — days, hours, minutes.

Find the aspect ratio and resize width or height while keeping proportions.