AI Calculator for Everyday Maths

An AI calculator you can talk to. Type a question the way you would say it — “What is 15% of 80?”, “How long is 3.5 hours in minutes?” — and Sumzo AI turns it into maths, works it out and shows each step.

Tip: use the math keyboard for symbols like √, x² and fractions. You can also attach a photo, screenshot or PDF of the problem (up to 4 files).

Try an example:
Explanation

How to use the AI math calculator

  1. Type your question in ordinary words. Include the numbers and units, such as “km”, “hours” or “$”.
  2. Press Solve. Sumzo AI works out which calculation you need and writes it down before doing it.
  3. Read the answer first, then the steps — each one says what was calculated and why.
  4. Not quite what you meant? Ask a follow-up in the same box, like “and with a 20% tip?”.

Worked examples

Easy: a percentage of a number

  1. Question: “What is 15% of 80?”
  2. 15% means 15 per hundred: 0.150.15.
  3. 0.15×80=120.15 \times 80 = 12, so 15% of 80 is 12.

Medium: average speed

  1. Question: “A car travels 150 km in 2.5 hours. What is its average speed?”
  2. Average speed is distance divided by time: 1502.5=60\frac{150}{2.5} = 60.
  3. The average speed is 60 km/h. Check: 60×2.5=15060 \times 2.5 = 150 km ✓.

Hard: a tip split between friends

  1. Question: “An 18% tip on a $64 meal, split between 4 people — how much each?”
  2. Tip: 0.18×64=11.520.18 \times 64 = 11.52, so the total is 64+11.52=75.5264 + 11.52 = 75.52.
  3. Each person pays 75.524=18.88\frac{75.52}{4} = 18.88, so $18.88 each.
  4. Check: 4×18.88=75.524 \times 18.88 = 75.52 ✓.

Tips for clear questions

  • Give every number its unit: “150 km in 2.5 hours”, not “150 in 2.5”.
  • Say what you want at the end: “… how much does each person pay?”
  • Percent changes need a starting value: “a $40 price raised by 15%”, not just “raised by 15%”.
  • For a long calculation, ask one question at a time and follow up.

Frequently asked questions

What is an AI calculator?

A calculator you can ask in plain language. Instead of typing 0.18 × 64 ÷ 4 yourself, you describe the problem and the AI works out the calculation — and shows it, so you can follow every step.

Is the AI calculator accurate?

Sumzo AI writes the maths, and Sumzo’s math engine re-checks the result whenever it can; each answer says whether it was checked. Sumzo can still make mistakes, so read the working.

What can I ask it?

Everyday maths: percentages and discounts, tips and splitting bills, speed, distance and time, unit conversions, averages and simple interest — and school maths too.

Is it free?

Yes. You can ask questions without an account; an account only saves your history.

Is there a calculator for one specific formula?

Yes — for a single calculation such as a percentage, interest or a unit conversion, the formula calculators give the answer instantly and show the formula they used.