Free online calculators & tools that just work.

Calculate monthly payments, total interest, and full amortization schedules for any loan — mortgage, auto, personal, or student.

Four modes: find X% of Y, what percent X is of Y, percentage change between two numbers, and percent-to-decimal conversion.

Calculate tip amounts and split bills between any number of people. Quick tip presets from 10–25% with service quality shortcuts.

See your real take-home pay after federal tax, state tax, Social Security, Medicare, and 401k deductions. All 50 US states supported.

Compare avalanche vs snowball debt payoff methods side by side. Enter multiple debts and see which method saves more interest and gets you debt-free sooner.

Which job actually pays more? Compare two offers after taxes, commute costs, and expenses to see the real take-home difference.

Calculate your Body Mass Index instantly. See your category, healthy weight range, and how much to lose or gain — with plain-English context, not just a number.

Compare the real annual fuel cost of a gas car versus an electric vehicle — or calculate costs for a single vehicle. Enter MPG, gas price, and kWh rate to see monthly and yearly savings.

Look up reliability by generation for Honda, Toyota, Lexus, Mazda and more. Calculate cost per remaining mile, find the mileage sweet spot, and compare up to 3 listings side by side before you buy.

See how your savings grow over time with compound interest. Enter your starting balance, monthly contributions, interest rate, and term to project your future balance.

Project your retirement nest egg based on current savings, monthly contributions, expected return, and retirement age. See if you're on track to retire when you want.

Estimate a fair DoorDash delivery tip from the order total and delivery miles, with weather, wait time and service factored in, plus a driver mileage cost lens.

Estimate a fair Walmart Spark or grocery delivery tip using order size, miles, heavy items, stairs and substitutions, with the driver mileage cost shown alongside.

Average gas and diesel prices for the US by region, state and major metro, updated weekly from official EIA survey data, with the week-over-week change.

Check the price on the pump against the weekly average for your state, so you can tell a genuine deal from a normal price dressed up as one.

Live word, character, sentence, paragraph, and line counts as you type. Includes reading time estimates and top word frequency analysis.

Unscramble any set of letters to find all valid words. Great for Scrabble, Wordle, and word games. Filter by word length.

Find perfect, near, and ending rhymes for any word. Useful for songwriting, poetry, and creative writing.

Scramble words or phrases into random letter arrangements. Great for creating word puzzles and games.

Turn any phrase into an acronym, or generate creative word expansions for any set of initials.

Count characters in any text with limits for Twitter, Instagram, SMS, and more. Live counting as you type.

Generate character names for novels, screenplays, and games. Filter by nationality, era, and gender to find the perfect name for any character.

Build formulas for Excel, Google Sheets, or Google Docs instantly. Choose your app, pick a formula type, fill in your values, and get a ready-to-use formula with a plain-English explanation.

Convert CSV files to JSON and back instantly. Paste your data, get clean output. No file uploads, no accounts.

Translate text to Morse code and back, play audio beeps at adjustable speed, record microphone taps or tones to decode in real time, and tap Morse on screen. Visual display included.

Generate API keys, access tokens and .env-ready secrets with prefixes such as sk_live or api_. Runs entirely in your browser.

Generate JWT signing secrets, webhook secrets and session secrets at the key lengths RFC 7518 requires, locally in your browser.

Create .htpasswd entries from your own username and password. The APR1 MD5 output is validated against Apache and OpenSSL reference examples.

Plan your full trip cost — flights, hotel, food, activities, and insurance. See your total and exactly how much to save per month to afford it.

Free step-by-step algebra, geometry, and trigonometry solver. Every step explained in plain English. No paywall, no sign-up — solving what Symbolab now charges for.

Powerball and Mega Millions frequency heat map, smart number generator, jackpot tax calculator, pool split, and check if your numbers ever would have won. Entertainment only.

Generate strong, random passwords with custom length, character sets, and complexity rules. All generation happens in your browser — nothing is transmitted or stored.

See exactly how much interest your credit card charges every single day. Enter your balance, APR, and due date to see daily accrual, total owed, and minimum vs full payment comparison.

Real break-even timeline for 200+ GPUs. Enter your electricity rate and GPU price — get daily, monthly, and yearly profit projections.

Find the best-value graphics card for gaming, local AI or a low-power build. Benchmark-per-dollar ratings with prices refreshed daily. Stop switching tabs to compare specs.

Compare GPUs for local AI by VRAM, model fit, estimated tokens per second, power draw, and price so you can buy hardware that matches Ollama, LM Studio, and llama.cpp.

See whether someone can send email pretending to be your business. Checks SPF, DKIM, DMARC and more, then explains each result in plain English.

Paste a raw email header and find out who really sent it — which delivery lines can be trusted, and what SPF, DKIM and DMARC actually reported. Nothing is uploaded.

Paste a URL and see whether AI crawlers can actually reach, read and cite it — robots.txt for ten named AI bots, noindex, redirects and canonical, with the evidence behind every finding.