100 free calculators & utilities

401(k) Fee Calculator

See what a higher expense ratio really costs you by retirement.

Auto Loan Calculator

Car payment with tax, trade-in, and the true total cost of the car.

Capital Gains Tax Calculator

Short vs long-term tax on a sale — 0/15/20% brackets and after-tax profit.

CD Ladder Calculator

Split savings across 3 or 5 CDs — schedule, maturity dates, and blended APY.

Compound Interest Calculator

Watch savings grow with monthly deposits and a year-by-year table.

Credit Card Payoff Calculator

How long to pay off your card — and what paying more would save.

Debt Snowball Calculator

Snowball vs avalanche on up to 5 debts — payoff time and interest.

Dollar-Cost Averaging Calculator

Steady monthly investing projected — and compared against a lump sum.

DRIP Calculator

See what reinvesting dividends adds in shares and dollars vs taking cash.

Emergency Fund Calculator

Your emergency fund target and how long it will take to reach it.

FIRE Number Calculator

Your FIRE number and how many years of saving it takes to reach it.

Freelance Rate Calculator

The hourly rate that covers taxes, overhead, and time off — not salary ÷ 2080.

HSA Calculator

Project HSA growth plus the income tax you save on contributions.

I Bond Calculator

Project Series I bond value over 1–30 years, penalty included under 5 years.

Inflation Calculator

What money from any year is worth today at 3% or your own inflation rate.

Loan Calculator

Monthly payment and total interest for any amortizing loan.

Mortgage Calculator

Monthly payment, total interest, and a full amortization schedule.

Mortgage Payoff Calculator

See how extra payments cut years and interest off your mortgage.

Net Worth Calculator

Everything you own minus everything you owe, with a full breakdown.

Paycheck Calculator

Estimate take-home pay after federal tax, FICA, 401(k), and state tax.

Raise Calculator

What a raise means per month, per paycheck, and over the next decade.

Refinance Break-Even Calculator

New rate vs closing costs: monthly savings and months to break even.

Rent vs Buy Calculator

Compare the true net cost of renting versus buying over time.

Retirement Calculator

Project your nest egg and the annual income it supports at 4%.

Roth IRA Calculator

Project tax-free Roth growth and compare it with a taxable account.

Salary to Hourly Calculator

Convert salary to hourly, daily, weekly, monthly — or hourly back to salary.

Savings Goal Calculator

How long to hit your goal — or the monthly deposit needed to get there on time.

Self-Employment Tax Calculator

SE tax with the wage-base cap, half-SE deduction, and estimated income tax.

Social Security Breakeven Calculator

Claim at 62, 67, or 70? See benefits and cumulative crossover ages.

Tip Calculator

Tip, total, and per-person split with one tap on 15/18/20/25%.

Bitcoin DCA Calculator

Project how much BTC a monthly buy could accumulate under a growth assumption.

Crypto Profit Calculator

Profit, loss, ROI, and break-even price for any crypto trade, fees included.

Crypto Tax Calculator

Rough short-term vs long-term capital gains tax estimate for a crypto sale.

DeFi Yield Calculator

Project DeFi earnings from APY or APR with daily or weekly compounding.

Gwei Converter

Convert wei, gwei, and ETH, and estimate gas fees in dollars.

Impermanent Loss Calculator

See how much a 50/50 liquidity pool position loses versus simply holding.

Satoshi Converter

Convert BTC, satoshis, and dollars instantly with an editable BTC price.

Staking Rewards Calculator

Estimate staking rewards with compounding and a token price assumption.

Alphabetical Sorter

Sort lines A-Z, Z-A, by length, or shuffle — with natural order.

Anagram Solver

Find every word that uses your exact letters, rearranged.

Case Converter

Switch text between UPPER, lower, Title, camelCase and more.

Character Counter

Live character count with limit meters for social and SEO.

Crossword Helper

Fill a pattern with ? wildcards to find matching words.

Duplicate Line Remover

Delete repeated lines from a list and count what was removed.

Fancy Text Generator

Turn text into bold, italic, script, and other Unicode styles.

Find and Replace

Replace text with case, whole-word, and regex options.

Lorem Ipsum Generator

Generate classic placeholder text by paragraph, sentence, or word.

Random Word Generator

Generate random English words, with length and letter filters.

Readability Checker

Flesch Reading Ease and Flesch-Kincaid grade with interpretation.

Remove Extra Spaces

Collapse double spaces, trim lines, and strip blank lines.

Reverse Text

Reverse characters, words, lines, or mirror your text.

Rhyme Finder

Find approximate rhymes by matching a word’s ending letters.

Scrabble Word Finder

Find the highest-scoring words you can play from your tiles.

Sentence Counter

Count sentences and see your average, longest, and shortest.

Text Diff Checker

Compare two texts and highlight added and removed lines.

Word Counter

Live word, character, sentence, and reading-time counts.

Word Unscrambler

Turn a jumble of letters into every word you can make.

Wordle Helper

Narrow down the answer using your green, yellow, and gray clues.

Cooking Converter

Convert cups, tablespoons, teaspoons, milliliters, and grams by ingredient.

Currency Converter

Convert 20 major currencies with editable, approximate offline rates.

Fraction to Decimal Converter

Convert fractions to decimals and decimals back to simplified fractions.

Fuel Economy Converter

Convert MPG (US), MPG (UK), and L/100km, plus estimate annual fuel cost.

Number Base Converter

Convert between decimal, binary, hexadecimal, and octal as you type.

Percentage Calculator

Three live modes: X% of Y, X as a percent of Y, and percent change.

Roman Numeral Converter

Convert numbers to Roman numerals and back, live, for 1 through 3999.

Shoe Size Converter

Convert shoe sizes between US men's, US women's, UK, and EU systems.

Time Zone Converter

Convert any time between 20 world cities with automatic DST handling.

Unit Converter

Convert length, weight, volume, temperature, area, and speed in one place.

Age Calculator

Exact age in years, months, and days — plus the day of the week you were born.

Business Days Calculator

Add business days to a date or count working days, skipping US holidays.

Countdown Timer

Live countdown to any date and time — days, hours, minutes, and seconds.

Date Difference Calculator

Days, weeks, and months between two dates — or add/subtract days from a date.

Hours Calculator

Add up weekly work hours from clock-in and clock-out times, minus breaks.

Unix Timestamp Converter

Convert Unix timestamps to dates and back, with a live current timestamp.

Week Number Calculator

ISO 8601 week number for any date, plus a full-year week overview.

BMI Calculator

Body mass index from height and weight, with WHO category and healthy range.

Body Fat Calculator

Estimate body fat percentage from tape measurements using the US Navy method.

Calorie Calculator (TDEE)

Daily maintenance calories and weight-goal targets using Mifflin-St Jeor.

Pregnancy Due Date Calculator

Estimate your due date from your last period or conception date.

Final Grade Calculator

Find the exam score you need to reach your target grade in a course.

GPA Calculator

Calculate your GPA on the 4.0 scale from course grades and credit hours.

Sleep Calculator

Find the best bedtime or wake time using 90-minute sleep cycles.

Trip Cost Calculator

Estimate a drive's fuel cost and split it per passenger, with tolls and parking.

Water Intake Calculator

Estimate daily water needs from body weight, exercise, and climate.

Aspect Ratio Calculator

Simplify a ratio and solve new dimensions that keep it.

Barcode Generator

Create Code 128 barcodes from text and download them as PNG.

Base64 Encoder / Decoder

Encode text to Base64 or decode it back, UTF-8 safe.

Coin Flip

Flip a virtual coin once or hundreds of times with running stats.

Color Picker & Converter

Pick a color and convert between HEX, RGB, and HSL with shades.

Hash Generator

Generate MD5, SHA-1, SHA-256, SHA-384, and SHA-512 hashes.

Invoice Generator

Build a professional invoice and print or save it as a PDF.

JSON Formatter & Validator

Pretty-print, minify, and validate JSON with error positions.

Markdown Preview

Write Markdown and see the rendered HTML update live.

Password Generator

Create strong, random passwords with a live strength meter.

QR Code Generator

Turn any text or URL into a downloadable QR code image.

Random Name Picker

Pick winners from a list or split names into fair teams.

Random Number Generator

Generate random numbers or roll dice with a fair, unbiased engine.

Screen Resolution Checker

See your screen size, viewport, pixel ratio, and calculate PPI.

URL Encoder / Decoder

Percent-encode text for URLs or decode encoded links back.

UUID Generator

Generate version-4 UUIDs individually or in bulk, ready to copy.