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Free calculators

Fourteen free calculators for pricing, quoting, and planning. No signup, no watermark.

Every number a small business argues about, computed instantly: what to charge, what tax to add, whether a job is profitable, what a project will cost in materials. Pick a calculator below — enter your numbers, get the answer, and when it is time to bill, Billia's free invoice generator is one click away.

Live Sales Tax Calculator Add sales tax to any price — see the tax and total instantly. Live VAT Calculator Add VAT to a net price or strip it out of a gross one. Live Service Price Calculator Labor + materials + markup = the price to charge. Live Profit Margin Calculator Margin vs. markup: know what you actually keep. Live Markup Calculator Set prices from costs with a target markup. Live Hourly Rate Calculator What to charge per hour to hit your income goal. Live Salary Calculator Hourly wage to weekly, monthly, and annual pay. Live Break-Even Calculator How many units you must sell to cover fixed costs. Live Paint Cost Calculator Gallons and material cost for any paint job. Live Roofing Cost Calculator Roofing squares and total job cost. Live Concrete Calculator Cubic yards and bag counts for any slab. Live House Cleaning Cost Calculator A rough price range for any cleaning job. Live Lawn Care Cost Calculator Per-visit and monthly mowing estimates.

Also free

Plus the document tools: quote generator, estimate maker, invoice generator

Frequently asked questions

What calculators does Billia offer?

Fourteen free calculators: business math (sales tax, VAT, profit margin, markup, hourly rate, salary, loan, ROI, break-even) and trade costing (paint, roofing, concrete, house cleaning, lawn care).

Are these calculators really free?

Yes. Unlimited calculations, no signup, no watermark, no catch — like all of Billia's free tools.

How accurate are the trade cost calculators?

They are quoting starting points, not final bids. The paint, roofing, concrete, cleaning, and lawn calculators use standard industry formulas, but real jobs vary by market, terrain, and condition — always finalize on site.

Can I turn a calculation into an invoice?

Yes. Run your numbers here, then bill them with Billia's free invoice generator — no signup, no watermark.

Turn the number into an invoice

Ran the numbers? Bill it with Billia's free invoice generator — no signup, no watermark.

Create an invoice