08Category
Utilities
Unit converters and everyday calculators.
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All Utilities tools
Unix Timestamp
Current epoch time and conversions
Aspect Ratio Calculator
Calculate and scale dimensions by ratio
Unit Converter
Length, mass, temperature, data, speed and more
Length Converter
Convert length units instantly
Weight Converter
Convert weight units instantly
Temperature Converter
Convert temperature units instantly
Speed Converter
Convert speed units instantly
Area Converter
Convert area units instantly
Volume Converter
Convert volume units instantly
Bytes Converter
Convert bytes units instantly
Percentage Calculator
Percent of, what percent, change and difference
Percentage Change
Increase or decrease between two values
Ratio Calculator
Simplify ratios and solve a : b = c : x
Compound Interest
Growth with contributions, year by year
CAGR Calculator
Compound annual growth rate between two values
Loan Calculator
Monthly payment, total interest and amortization
EMI Calculator
Equated monthly installment for any loan
Discount Calculator
Sale price, savings and stacked discounts
Tip Calculator
Tip and split the bill
Time Calculator
Add and subtract hours, minutes and seconds
Date Difference
Days, weeks and business days between dates
Time Zone Converter
Compare a moment across time zones
DPI & Print Size
Pixels, inches and DPI for printing
Resolution Calculator
Megapixels, aspect ratio and pixel density
Scientific Calculator
Trigonometry, logs, powers, factorials and history
Simple Interest
Interest on a principal without compounding
SIP Calculator
Future value of a monthly investment plan
Inflation Calculator
Future cost and purchasing power over time
Savings Goal Calculator
How long until you reach a savings target
Rule of 72
Years for an investment to double
Unit Price Comparison
Which pack is better value per gram, ml or piece
VAT / GST / Sales Tax
Add or remove tax from a price
Average Calculator
Mean, sum and count of a list of numbers
Weighted Average
Average where each value has a weight
Prime Number Checker
Is it prime? Prime factorization and the next prime
GCD & LCM Calculator
Greatest common divisor and least common multiple
Factorial Calculator
Exact n! for large numbers
Exponent & Root Calculator
Powers and nth roots
Logarithm Calculator
log in any base, ln and log₂
Modulo Calculator
Modulo vs. remainder, and the integer quotient
Quadratic Equation Solver
Real and complex roots of ax² + bx + c
Fraction Calculator
Add, subtract, multiply and divide fractions
Split Bill Calculator
Split a bill and tip between people
Proportion Calculator
Solve a : b = c : x and simplify ratios
Mortgage Calculator
Monthly payment, total interest and amortization
World Clock
Current time across cities and time zones
QR Code Generator
Links, text, Wi-Fi, contacts and more — PNG or SVG
Wi-Fi QR Code
Let guests join your Wi-Fi by scanning
Contact QR Code (vCard)
A scannable business card
- Image
QR Code Scanner
Read QR codes from images, screenshots or your camera
Barcode Generator
Code 128, EAN-13, UPC-A, EAN-8 and Code 39
EAN-13 Barcode
Retail product barcodes with automatic check digit
UPC-A Barcode
US/Canada retail barcodes
Week Number
ISO week number, day of year and week date ranges
ISO 8601 Formatter
A date in ISO 8601, RFC 2822, Unix and more
Relative Time
“3 days ago” or “in 2 hours” for any date
Countdown
Live countdown to (or time since) any date
Duration Calculator
Add durations like 1h 30m + 2:20:00, convert to ISO 8601
Working Days Calculator
Business days between dates, skipping weekends and holidays
Add / Subtract Days
The date N days before or after another
Random Number Generator
Secure random numbers in any range, unique or sorted
Random Color Generator
Random colors with HEX, RGB and HSL
Random Name Generator
Made-up names and usernames for testing
Random Picker
Pick winners or shuffle a list fairly
Dice Roller & Coin Flip
Roll any dice (d4–d100) or flip a coin
Number Base Converter
Binary, octal, decimal, hex and any base 2–36 — any size
Roman Numeral Converter
Numbers to Roman numerals and back (1–3999)
Number to Words
Write any number out in English words
Amount in Words (Cheque Writer)
Money amounts written out for cheques and invoices
Stopwatch
Precise stopwatch with lap times
Countdown Timer
Minutes-and-seconds timer with an alarm
Pomodoro Timer
Focus and break rounds (25/5/15) with sound
BMI Calculator
Body mass index and the healthy weight range for your height
Calorie Calculator (TDEE)
Daily calories to maintain, lose or gain weight
Age Calculator
Exact age in years, months and days, and the next birthday
Fuel Cost Calculator
Trip fuel cost from distance, economy and price
Electricity Cost Calculator
Running cost of a device per day, month and year
Running Pace Calculator
Pace, speed and race-time predictions
- Text
Statistics Calculator
Mean, median, mode, standard deviation, percentiles and outliers
Timestamp Converter
Unix time, ISO 8601 and time zones
px ⇄ rem / em Converter
Pixels to rem and em (and back) for any root size
Viewport Unit Calculator
vw, vh, vmin and vmax to pixels
8px Grid Calculator
Snap sizes to an 8-point (or any) grid
Golden Ratio Calculator
Split a size by φ and build a golden type scale
Tone Generator
Sine, square, saw and triangle tones at any frequency
White / Pink / Brown Noise
Noise for focus, sleep or acoustic testing
Metronome
Accurate clicks with accents, 30–260 BPM
Hourly ↔ Annual Salary
Convert between hourly, weekly, monthly and yearly pay
ROI Calculator
Return on investment, with annualized return
Freelance Rate Calculator
Hourly and day rate from your income goal, costs and tax