What calculations does the percentage tool support?
Four modes: B% of A, percentage change A to B, discounted price of A at B% off, and A increased by B%.
How do I calculate 20% off $100?
Pick the discount mode, A=100, B=20 — the result shows instantly.
Are results precise?
Two decimals — sufficient for shopping, finance and change statistics.
Is online calculation safe?
Safe — runs locally, zero upload, pure math.
What is it best for?
Shopping discounts, salary changes, investment returns, exam scores and sales commissions.
Are there limits on free use?
No. Free, no registration, instant on input.
Can it compute percentage change?
Yes — the change mode takes two values and shows the percentage.
Is it real-time?
Yes — recalculates on any input change, no button needed.