Student & Education Suite

Loan calculator with biweekly mode, extra payments, one-time lump sums, full amortization schedule, and CSV export.

Mortgage calculator with PITI, PMI auto-removal, biweekly, affordability, refinance, points, and rent-vs-buy. Full amortization with CSV export.

Plan your monthly budget with income and expense tracking. See spending breakdowns.

Convert between meters, feet, inches, miles, kilometers, and more. Supports metric, imperial, and nautical units.

Convert between kilograms, pounds, ounces, stones, and more. Metric and imperial weight units.

Convert between Celsius, Fahrenheit, Kelvin, and Rankine. Formula-based conversion with reference points.

Convert between square meters, acres, hectares, square feet, and more.

Convert between liters, gallons, cups, tablespoons, and more. Metric, imperial, and US units.

Convert between m/s, km/h, mph, knots, and more. Includes speed of light and sound.

Calculate percentages, percentage changes, and proportions with ease.

Full-featured scientific calculator with trigonometry, logarithms, and advanced math operations.

Free Pomodoro timer with task list, active-task binding, and a live countdown in the browser tab title. Wall-clock accurate, no signup.

Create and study flashcards with flip animations. Track progress and organize by deck.

Build digital logic circuits with NAND gates, clocks, and tri-state buffers. Simulate signal propagation in real time.