Nine free tools · no account

Pick the job.
Get the answer.

Pricing, runway, fees, meetings — each page runs in your browser. Type, share the link, skip the spreadsheet.

Fee reverse calculator Runway & burn Price calculator

All tools

One URL, one job.

Price calculator

Cost floor, margin, fees, and a Free / Pro / Business ladder.

Fee reverse calculator

Want to net $1,000? See how much to invoice after processor fees.

Freelance rate

Take-home, overhead, tax, and PTO → minimum hourly and day rate.

Employee cost

Salary + burden + extras → true annual and productive hourly cost.

Runway & burn

Cash, revenue, expenses → months left and a zero-cash date.

LTV & CAC

ARPU, churn, and CAC → LTV ratio and payback months.

Timezone fairness

See overlap, golden hours, and who always gets the painful meeting slot.

Meeting cost clock

Attendees × rate → live dollar ticker while the call runs.

Scam check

Paste a message. Get a risk score, red flags, and what to do next.

How it works

Three steps. Then you’re done.

  1. Pick a tool

    Each page does one job — pricing, runway, fees, meetings, and more. No account wall.

  2. Run it in your browser

    Your inputs stay on this device. We don’t save a spreadsheet for you in the cloud.

  3. Share the link

    Copy a URL with your numbers in it — handy for a co-founder, client, or your future self.

Common questions

Do I need an account?

No. Open a tool, use it, leave. There is no sign-up, login, or saved workspace.

Do you store what I type?

There is no account database. Numbers stay in your browser unless you use a share link — then they live only in the URL. Scam check analyzes pasted text locally and never uploads it.

What does the share link do?

It encodes your inputs in the address bar so someone else opens the same calculation. Handy for Slack or email — still no login required.

Are these official financial or legal answers?

No. This is napkin math to help you think — not tax, legal, or investment advice. Double-check before you sign, invoice, or publish prices.

Is Do One Job free?

Yes. All nine tools are free to use today. No paywall on the calculators.

Which tool should I start with?

Pricing or invoicing → Price calculator or Fee reverse calculator. Cash & growth → Runway or LTV & CAC. Freelance or hiring → Freelance rate or Employee cost. Meetings & time zones → Meeting cost or Timezone fairness.