Free study tools

Useful tools for homework & exam prep

No sign-up, no ads, no waiting — everything runs in your browser. Great for checking homework, exam practice and mental math.

Percentage Calculator

The two percentage questions students actually need for marks, discounts and exam prep — answered instantly.

% of = —

Example: “What is 25% of 360?” → 90 marks out of 360.

is what % of —

Example: “I scored 72 out of 90.” → 80% — nice work!

Type any fraction and see it as a decimal and a percentage — perfect for checking homework.

⁄ = —decimal = —percent

Example: 3 ⁄ 4 = 0.75 = 75%. Negative fractions work too, like −1 ⁄ 2 = −0.5 = −50%.

Master every table from 1× to 12×. Tap the card to flip it, then mark honestly — your brain learns from the reps, not from cheating!

Practice table:

Tap the card to flip 7 × 8

✓ Known: 0 ✗ Learning: 0 Accuracy: — Best run: 0 in a row