Math Tools

Everyday calculators for quick number problems — no formula memorization required.

These calculators handle the math problems that come up most often — working out percentages, splitting restaurant bills, calculating discounts and tips. All results are instant and run entirely in your browser.

Percentage Calculator
Find what percent one number is of another, calculate percentage increase or decrease, and work out discounts.
Tip Calculator
Enter the bill and tip percentage to get the tip amount, total, and per-person split for any group size.