Take-Home-Paycheck Calculator
What actually lands in your account after every deduction.
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Payback Period Calculator
How long an investment takes to repay itself.
Average Return Calculator
CAGR against the arithmetic mean, and why they differ.
CD Calculator
Certificate of deposit maturity value, APY and early withdrawal.
Finance Calculator
Solve for any of PV, FV, payment, rate or number of periods.
Repayment Calculator
How long a debt takes to clear at the payment you can make.
Temperature Calculator
Convert Celsius, Fahrenheit and Kelvin with the formulas shown.
Electricity Cost Calculator
What an appliance costs to run per hour, day, month and year.
Body Surface Area Calculator
BSA by the Du Bois, Mosteller, Haycock and Boyd formulas.
Body Type Calculator
Body shape from bust, waist and hip measurements.
Carbohydrate Calculator
Daily carbs in grams, and what a low or high carb day looks like.
Date Calculator
Add or subtract days, weeks, months and years from any date.
Inflation Calculator
See what an amount is worth over time at any inflation rate.
Break-Even Calculator
Find the units and revenue needed to cover your fixed costs.
Markup Calculator
Set a selling price from cost plus markup, with the margin shown.
Tip Calculator
Work out the tip and split the bill between any number of people.
GST Calculator
Add or remove GST at any rate, with the net, tax and gross shown.
Period Calculator
Next period dates, cycle phases and a twelve-month calendar.
Conception Calculator
When conception most likely happened, and the window around it.
Number Sequence Calculator
Arithmetic, geometric and Fibonacci terms and sums.
Right Triangle Calculator
Solve a right triangle from any two known values.
Grade Calculator
Your current grade, and what you need on the final.
Resistor Calculator
Colour codes both ways, plus series and parallel values.
Image Info Checker
See dimensions, format, colour depth and file details.
Photo GPS Location Finder
Find where a photo was taken, from its own metadata.
Image Color Counter
Count the unique colours in an image and list the top ones.
Grayscale Image Converter
Turn a photo black and white with proper luminance weighting.
Image to PDF Converter
Combine images into a single PDF, one page each.
Sentence Case Converter
Rewrite text so only sentence starts and proper nouns are capitalised.
Remove Blank Spaces
Strip every space from a string, or just the ones you choose.
Sort Lines Z–A
Sort a list into reverse alphabetical order.
Missing Text Finder
Find the lines in one list that are absent from another.
Text to ROT13
Apply the ROT13 letter rotation to hide a spoiler.
Text to Decimal
Convert text into decimal character codes.
Automated Readability Index
A readability grade based on characters rather than syllables.
Blog Title Generator
Turn a topic into dozens of workable title options.
XML Sitemap Validator
Check a sitemap for the errors that make Google reject it.
Keyword Prominence Checker
Check where a keyword appears on a page, not just how often.
HowTo Schema Generator
Steps, tools and materials as HowTo structured data.
LocalBusiness Schema Generator
Address, hours, phone and geo as LocalBusiness JSON-LD.
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