Formulas
How to Use
Select what you want to find — P/L%, Selling Price, or Cost Price.
Enter the known values. Use a negative % for loss scenarios.
Get profit/loss amount, percentage, and full breakdown instantly.
Frequently Asked Questions
Profit% = (SP − CP) ÷ CP × 100. Always calculated on Cost Price unless stated otherwise.
CP = SP × 100 ÷ (100 + Profit%) = 1000 × 100 ÷ 125 = ₹800.
Marked Price (MP) is the listed price. Discount = MP − SP. Discount% = (MP − SP) ÷ MP × 100. Effective Profit% = (SP − CP) ÷ CP × 100.
Net discount = a + b − (ab/100) = 20 + 10 − (200/100) = 28%. The SP = MP × 0.80 × 0.90 = 0.72 × MP. This formula works for any two successive discounts and is faster than calculating step-by-step.
Let CP = 100. At 10% loss, SP₁ = 90. For 20% profit, SP₂ = 120. Increase needed = 120 − 90 = 30, which is 30/90 × 100 = 33.33% more than SP₁. Alternatively: new SP / old SP = (100 + profit%) / (100 − loss%) = 120/90 = 4/3. Multiply old SP by 4/3 to get new SP.
This is a classic trap: whenever two items are sold at the same SP, one at x% profit and one at x% loss, there is always a net loss. Net loss% = (x/10)² = (10/10)² = 1%. CP of item 1 = 990×100/110 = ₹900; CP of item 2 = 990×100/90 = ₹1100. Total CP = ₹2000, Total SP = ₹1980. Net loss = ₹20 (1% of ₹2000).