Calculate savings and final price after a percentage discount. Perfect for shopping, sales, and budget planning. Everything runs locally in your browser — nothing is uploaded.
Calculate total price including sales tax. Enter the pre-tax amount and tax rate to see the exact tax amount and final total. Everything runs locally in your browser — nothing is uploaded.
Calculates gross margin percentage, markup percentage, cost, and selling price from any two known variables — perfect for retail pricing, wholesale negotiations, and e-commerce product listing optimization where you need to work backwards from a target margin.
Calculate the future value of monthly savings with compound interest. Plan your savings goals and see your money grow over time. Everything runs locally in your browser — nothing is uploaded.
Computes percentage values, percentage increases and decreases, and what-percent-of-what relationships with precise decimal arithmetic. Essential for everyday math — tips, discounts, tax rates, grade scores, and statistical comparisons where quick percentage answers are needed.
Calculate your final grade using weighted assignment scores. Enter grades and their weights to compute your overall percentage. Everything runs locally in your browser — nothing is uploaded.
Multiply, don't add: 30% then 20% off $100 → $100 × 0.70 × 0.80 = $56 (44% total, not 50%). Retailers stack precisely because most shoppers add.
Yes in this case: $100 × 0.50 × 0.80 = $40 paid, i.e., 60% off. Stacking multiplies remainders: (1−0.5)(1−0.2) = 0.40. The calculator chains any discount sequence correctly — never just add the percentages.
Divide sale price by (1 − claimed discount) to recover the alleged original — then check price history. A $70 '50% off' implies $140 original; if it never sold above $90, the discount is theater.
After, in most jurisdictions — tax applies to the discounted price. $100 item at 30% off with 8% tax: $70 × 1.08 = $75.60, not $78.
No. All calculations run locally in your browser. Nothing leaves your device.
Markup Calculator
Calculate markup percentage, selling price, and gross profit from cost. Essential for retail pricing and margin analysis. Everything runs locally in your browser — nothing is uploaded.
Receipt Generator
Creates printer-friendly receipt pages with itemized purchases, payment method, date, and merchant details in a compact single-page layout. Everything runs locally in your browser — nothing is uploaded.