Free tools

Everyday calculators — no sign-up, calculated in your browser, your numbers never leave it. Like one? Ask for the full version or the pack at the bottom of the page.

• Percentages

  What % of · is what % · change · add/subtract

  Use daily · Free-only tool

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• Unit converter

  Rai, ngan, sq wa · inch, cm · lb, kg · gold baht

  Use daily · Free-only tool

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• Bill splitter + tip

  Dinner with friends — how many people, how much each

  Use daily · Free-only tool

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• Stopwatch

  Hundredths of a second, with laps

  Use daily · Free-only tool

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• Countdown

  Set a time with an alarm (25-minute Pomodoro)

  Use daily · Free-only tool

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• Random · dice · picker

  Random number, dice, coin flip, name draw

  Use daily · Free-only tool

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• Link → QR code

  Free, no watermark, PNG/SVG download

  Use daily · Grows into: Office Documents Pack

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• BMI · calories · water

  Body-mass index and daily energy use

  Use daily · Grows into: Health Pack

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• Word & character counter

  Thai and English — captions, articles, assignments

  Use daily · Free-only tool

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• VAT 7% + withholding tax

  Add/remove VAT and the net to transfer

  Use monthly · Grows into: Self-employed & Tax Pack

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Coming next

• PromptPay QR
• Parcel shipping cost
• Unit cost + break-even
• Stacked discounts
• Thai (B.E.) date + credit terms
• Income tax estimate