General-purpose tools for everyday calculations — basic math, GPA, budget, debt payoff, inflation, profit margin, and more. Fast, accurate, no sign-up required.
Add, subtract, multiply, and divide with full decimal precision. Keyboard shortcuts supported — no floating-point surprises.
Calculate your semester or cumulative GPA on the standard 4.0 scale. Add courses, credit hours, and letter grades for an instant result.
Calculate break-even point in units and revenue, contribution margin, and margin of safety for any product or business.
Calculate gross profit margin, operating margin, net profit margin, and markup percentage for any business. Includes a visual P&L breakdown and EBITDA margin.
Calculate how long it takes to pay off your credit card balance and how much interest you'll pay. Compare minimum payment vs. fixed payment vs. target payoff date strategies.
Calculate the inflation-adjusted value of any dollar amount between 1913 and 2024 using CPI data. See how purchasing power has changed over time.
Build your monthly budget using the 50/30/20 rule. Enter your income and expenses to see how your spending compares to recommended targets for needs, wants, and savings.
Calculate how to pay off multiple debts using the avalanche (highest interest first) or snowball (smallest balance first) method. See your payoff date and total interest saved.
Estimate your business value using 4 methods: SDE multiple, EBITDA multiple, revenue multiple, and asset-based valuation. See a blended estimate and realistic valuation range.