Price work. Protect your margin.
A profit margin calculator shows what remains from a sale. Markup starts with your cost; break-even finds the sales needed to cover it.
CALCULATE. CONVERT. MAKE YOUR NEXT MOVE.
Free calculators.
Clearer
decisions.
Calculate profit margin, markup, break-even and percentages. Convert units, currencies and time zones. Plan a project with clear formulas, then keep your calculations together in a personal workspace.
54Useful calculators
8Everyday categories
Free core toolsNo sign-up to calculate
Your spaceSave as you go
Clarity in every resultFormulas and assumptions,
right where you need them.
right where you need them.
Less effort. More answers.Simple inputs.
Instant calculations.
Instant calculations.
One useful collectionFrom quick questions
to bigger projects.
to bigger projects.
At home on any screenMade for your desktop,
tablet, and phone.
tablet, and phone.
Pick up where you left offYour favorites and history,
saved on this device.
saved on this device.
START WITH THE JOB IN FRONT OF YOU
Business calculators, percentage tools
and everyday converters.
Convert a number. Keep its meaning.
Work out a percentage or percentage change, convert measurements, and compare dates across time zones. Currency conversions show the exchange rate used.
Measure the project before you start.
Estimate concrete volume, compare shipping volume and dimensional weight, or total work hours. Keep dimensions, allowances and assumptions beside the answer.
A TOOL FOR THE QUESTION AT HAND
What are we working out?
From everyday math to your next big idea.
Find the right calculator, and take it from there.
MORE THAN A QUICK ANSWER
A smarter way
to calculate.
Some numbers are worth coming back to. Save your calculations, compare a few possibilities, and keep your favorite tools close.
Meet your workspace Device history stays local. No account needed.HistorySaved
(12,500 × 0.18) + 2,0004,250Example calculation
850 ÷ 5170Example calculation
2,400 × 1.152,760Example calculation
√(144)12Example calculation
Make this space yours A home for your “what ifs.”Save. Compare. Come back later.
The everyday essentials.
A few good tools you’ll reach for again and again.
Profit Margin
Understand profit as a share of your revenue.
Percentage Calculator
Find a percentage of any amount, instantly.
Markup Calculator
Turn your cost and target markup into a selling price.
Break-Even Calculator
Know how many sales cover your fixed and variable costs.
Length Converter
Convert metric and imperial lengths, from millimeters to miles.
Time Zone Converter
Convert a dated local time between IANA time zones, with explicit daylight-saving choices.
Built for the way you think.
For the spreadsheet person. The back-of-a-napkin person.
And everyone who just needs a clear answer.
A LITTLE EXAMPLE
Good work deserves good numbers.
Cost 75 · Price 10025% margin
Turn costs into a clear price, compare your margins, and save a scenario to pick up later.
Find your marginLet’s make the numbers easier.
One place for your everyday questions. Your next answer is a click away.
No sign-up requiredJust open a tool and start.
All 54 tools are freeNo paywall between you and an answer.
Works wherever you doIn your browser. On your screen.
FROM A QUICK QUESTION TO REPEATABLE WORK
Free calculators for business,
conversions, and everyday decisions.
Calculate percentages, compare product pricing, estimate concrete and shipping volume, convert units, plan work hours, or build a calculator set for a recurring task. Every tool makes its method and assumptions visible.
KNOW WHAT COMES NEXT
Put renewals on a calendar.
Audit streaming, AI, software and memberships using actual charge dates. Keep currencies separate and review future renewals.
Plan recurring costs →WORK THROUGH THE DECISIONTrips, collections, energy.
Inspect card-selling costs, fuel and EV energy, server capacity, solar quantities, or your chosen bonsai and terrarium mix.
Choose a workflow →PLAN THE WORKPrice, project, compare.
Profit margin, markup, break-even, and monthly profit projections. Keep the assumptions beside the answer.
Explore profit scenarios →MAKE IT YOURSA canvas for your calculations.
Arrange live calculator widgets, snap them into place, and save a result when it is worth coming back to.
Build your working space →WORK ACROSS BORDERSDates, currencies, context.
Convert dated time zones, calculate with an explicit exchange rate, and organize records for tax preparation.
Organize the records →TURN KNOWLEDGE INTO A TOOLA formula you can inspect.
Start with a guided description, edit fields and units, and test an answer you already know. Developers can use HTTP or MCP.
Create a calculator →A percentage calculator in your language.
Complete translated task surfaces, with language review status made explicit.