Calculate savings and final price after a percentage discount. Perfect for shopping, sales, and budget planning. Figures never leave your device — every calculation runs locally in your browser.
Calculate simple interest using principal, rate, and time. Find total interest earned and final amount for basic interest calculations. Figures never leave your device — every calculation runs locally in your browser.
Calculate the future value of monthly savings with compound interest. Plan your savings goals and see your money grow over time. Figures never leave your device — every calculation runs locally in your browser.
Calculate the tip amount and total bill per person. Customize tip percentage and split among any number of people. Figures never leave your device — every calculation runs locally in your browser.
Calculate total cost of software licenses by seats, price per seat, and billing cycle with annual discount. Budget and plan your SaaS subscription costs. Numbers never leave your device — every calculation runs locally in your browser.
Compute your overall course percentage from comma-separated assignment grades and their matching weights — Exam Heavy presets included. Numbers never leave your device — every calculation runs locally in your browser.
Multiply, don't add: 30% then 20% off $100 → $100 × 0.70 × 0.80 = $56 (44% total, not 50%). The tool takes one discount at a time — run the first result through again for the second.
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 — compute each leg separately here, 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
Price products from cost with markup percent — margin, selling price, and profit united. Cost $20 at 50% markup sells $30 — free, local, no signup.
Receipt Generator
Creates printer-friendly receipt pages with itemized purchases, payment method, date, and merchant details in a compact single-page layout. Figures never leave your device — every calculation runs locally in your browser.
Last updated October 2026