OmniTools

All tools

Finance & Money

Compound Interest Calculator — Predict long-term investment growth with recurring deposits and compound frequencies.
Mortgage / Loan EMI Calculator — Calculate monthly EMI, interest total, and full repayment schedule.
Discount & Sale Calculator — Find final price, discount savings, stackable coupons, and tax additions.
Tip & Bill Split Calculator — Calculate tip percentage, bill total, and exact per-person breakdown.
Salary ↔ Hourly Converter — Convert annual salary to hourly, daily, weekly, and monthly pay rates.
Currency Exchange Rate Calculator — Convert between 160+ world currencies using live, constantly updated exchange rates.
Gold & Silver Price Calculator — Calculate the live value of gold or silver in grams, kilograms or troy ounces.
Crypto Price Tracker — Live crypto prices with a candlestick chart and an instant coin-to-cash converter.
Stock Quote Lookup — US-listed stock quotes with a candlestick chart and a shares-to-value calculator.
VAT & Sales Tax Calculator — Add tax to a net price or strip it out of a gross price, at any rate.
Overtime Pay Calculator — Work out overtime, double time, night and holiday pay from your base hourly rate.
Average Down & Cost Basis Calculator — See your new average price after buying more, and how many shares a target average needs.
EV Charging Cost Calculator — Cost, time and range added for a charge, from battery size, tariff and charger power.

Health & Fitness

BMI Calculator — Calculate body mass index with Metric / Imperial units and WHO health range.
TDEE & Macro Nutrition Calculator (BMR) — Calculate total daily energy expenditure (TDEE), BMR, and optimal Carbs/Protein/Fat macro splits for diet goals.
Waist-to-Hip Ratio (WHR) Calculator — Evaluate waist-to-hip ratio, abdominal fat distribution (Apple vs Pear shape), and health risk levels.
Standard & Ideal Body Weight Calculator — Ideal body weight from the Devine, Robinson, Miller and Hamwi equations, with a WHO/CDC healthy-weight band.
Pregnancy Due Date Calculator — Estimate due date, pregnancy weeks, and trimester milestone timelines.
Ovulation & Fertile Window Calculator — Track estimated ovulation dates, peak fertility days, next period, and multi-cycle calendar.
Exercise Calorie Burn Calculator — Calculate calories burned across 20+ sports & daily activities with MET values and food equivalents.
Body Fat Percentage Calculator — Estimate body fat percentage using US Navy circumference measurements.
Daily Water Intake Calculator — Calculate recommended daily water target based on weight, climate, and workout.
Blood Alcohol (BAC) Calculator — Estimate blood alcohol with the Widmark formula. An estimate only — never a fitness-to-drive test.
Sleep Cycle Calculator — Bedtimes and wake-up times that land between 90-minute sleep cycles, not in the middle of one.
Quit Smoking Savings Calculator — Money saved, cigarettes not smoked and health milestones reached since your quit date.

Converters & Time

Universal Unit Converter — Instant conversion across length, weight, area, volume, temp, speed, pressure, energy, and digital storage.
Time Zone & World Clock Converter — Compare global city time zones and find optimal meeting overlap slots.
Date Difference & Age / D-Day Calculator — Calculate exact age, days between dates, and personal event D-day countdowns.
Work Hours & Timecard Calculator — Log check-in/out times, unpaid breaks, overtime pay, and weekly totals.

Math & Productivity

Percentage Calculator — Calculate percentage values, percentage changes, ratios, and increases.
Scientific & Fraction Calculator — Full scientific math keypad, fraction simplification, mixed numbers, and history.
Random Picker & Generator — Generate random numbers, spin the prize wheel, pick names, or flip coins.

Developer & Tech

JSON Formatter, Validator & Minifier — Format, validate, prettify, or minify raw JSON strings with syntax error detection.
Base64 & URL Encoder / Decoder — Convert text or files to Base64 data strings and encode/decode URL components.
Regex Pattern Tester & Debugger — Test regular expressions in real-time with match highlighting and preset patterns.
Color Converter & Contrast Checker — Convert HEX, RGB, HSL, HSV, CMYK and test WCAG contrast accessibility.
QR Code Generator & Scanner — Generate QR codes for text, URL, WiFi, and scan QR codes via camera/file.
Text Diff & Word Counter — Side-by-side text comparison, line-by-line diff visualizer, and word statistics.
Unix Timestamp Converter — Epoch to date and back, in seconds, milliseconds, microseconds or nanoseconds.

Games & Fun

Gomoku (Five in a Row) — Classic 15x15 Gomoku board game with Single Player (Vs AI) and 2-Player modes.
Fruit Merge Puzzle — A physics puzzle built by OmniTools. Drop fruit, merge matching pairs, and work up the tiers.
Ghost Leg Random Assigner — Pair people with items at random — chores, teams, seating, who presents first.
2048 Puzzle — Slide and merge matching number tiles with arrow keys or swipes to reach the 2048 tile.