Free Project Cost Calculator
Add your tasks, hours and hourly rate to calculate a project's total cost — with optional extra costs, margin and tax — plus your effective hourly rate. Free and instant.
Estimate
What is the project cost calculator?
A project cost calculator is a free tool that estimates what a project will cost based on the work involved. You add each task with its hours and hourly rate, plus any extra costs, a margin and tax, and it calculates the labour cost, the total and your effective hourly rate. Slashit's calculator runs entirely in your browser, so your numbers stay private, and it works instantly as you type. It's ideal for freelancers and agencies putting together a quote, or anyone who needs a quick, defensible estimate before sending a proposal to a client.
How our free project cost calculator works
Add your tasks
List each task with the estimated hours and your hourly rate.
Add extras, margin & tax
Include any extra costs, a profit margin and a tax rate if they apply.
See the total
The labour cost, total estimate and your effective hourly rate calculate instantly.
Who uses our free project cost calculator?
Freelancers
Quote projects with confidence and know your effective hourly rate.
Agencies & studios
Build consistent estimates across tasks and team members.
Consultants
Turn a scope into a defensible number before sending a proposal.
Why use the project cost calculator?
Instant estimate
Totals update the moment you change hours, rates or margin.
Margin & tax built in
Add profit margin and tax so the total reflects what you'll actually charge.
Free & private
No sign-up, and your figures stay in your browser.
Frequently asked questions
How is the cost calculated?
It multiplies each task's hours by its rate for the labour cost, adds any extra costs, applies your margin, then adds tax — and also shows your effective hourly rate.
Can I use my own currency?
Yes — pick your currency from the list and all amounts display in it.
Is it free?
Yes — it's free, needs no sign-up, and runs entirely in your browser.
