Question 1

How do I calculate discount price?

Accepted Answer

Final price = Original × (1 - discount%). 100 at 20% off = 100 × 0.80 = 80. Or subtract: 100 - (100×0.20).

Question 2

How do I find the original price before discount?

Accepted Answer

Original = Final / (1 - discount%). If paid 80 at 20% off: 80/0.80 = 100 original.

Question 3

How accurate are these calculations?

Accepted Answer

Our calculator uses double-precision floating-point arithmetic, accurate to about 15-16 significant digits for most calculations.

Question 4

Can I use the result in further calculations?

Accepted Answer

Yes, results are calculated to full precision. You can copy the exact value or use the rounded display depending on your needs.

Discount Percentage Calculator

Frequently Asked Questions