100+ tools · Offline · Free

All calculators
in one place.

UniCalc is the free all-in-one calculator for school, work, and daily life. Scientific, EMI, BMI, unit conversion, engineering, and finance — one home screen, clear results.

Download for Android See what's inside
Works offline for most tools No sign-up required Light & dark theme
Key features

Six categories. One home screen.

Pick a calculator, enter the numbers, tap Calculate. Results stay on the same screen — with units, share, and a layout that stays familiar everywhere.

Educational

  • Standard, scientific, and programmer calculators
  • 2D & 3D geometry plus coordinate geometry
  • Statistics, hypothesis testing, and graphing

Engineering

  • Electrical: voltage drop, Ohm’s law, energy, resistors
  • Civil: materials, load, reinforcement, and cost
  • Mechanical and chemical tools for class and site

Finance

  • EMI, mortgage, SIP, lump sum, and stocks
  • Live currency converter with offline cache
  • Income tax, gold, profit, discount, VAT / GST

Health & Fitness

BMI, body fat, measurements, calories, blood pressure, pregnancy due date, and child growth. For information only — not medical advice.

Daily life

  • Length, weight, volume, area, temperature
  • Shopping, tip, split bill, cooking converters
  • Age, time zones, data size, download time

Developer tools

  • Number systems and bitwise operations
  • Hashes, regex, JSON, Base64, URL and IP
  • Sorting and searching visualizers
How it works

Three steps to an answer

No account to create. Install the app and calculate on the same day.

STEP 01

Open a category

Home lists Educational, Engineering, Developer, Daily Life, Health & Fitness, and Finance. Expand a group and tap the tool you need.

STEP 02

Enter the inputs

Fields start empty. Type the values, pick units or a currency, then tap Calculate or Convert. Nothing runs until you ask.

STEP 03

Read and share

Results stack on the same screen. Change a number to update live after the first calculate, reset when you want a clean slate, or share the answer.

Private by design

Your numbers stay on the phone

UniCalc is a calculator, not a cloud account. There is no sign-up. Almost every tool works offline. Currency rates, ads, crash reports, and performance data use Google services described in the privacy policy.

Read the full Privacy Policy
Who it's for

Built for answers, not another app per subject

If you searched for a scientific calculator, EMI calculator, BMI calculator, unit converter, or engineering calculator — UniCalc is built for you.

Students Homework, geometry, statistics, and a graphing calculator
Engineers Electrical, civil, mechanical, and chemical tools in one list
Professionals EMI, tax, currency, SIP, and business margins
Everyday use Units, shopping, cooking, BMI, and date tools
FAQ

Questions people ask first

Is UniCalc free?

Yes. UniCalc is free to download and use. It shows advertisements. There is no account and no paid unlock required to use the calculators.

Does it work without internet?

Almost everything is offline. Internet is used for live currency rates (cached after the first fetch), advertisements, crash reporting, performance monitoring, and Play Store review or update prompts.

Where is my data stored?

Settings and recent values live on your device. UniCalc does not create an account or upload your calculator inputs to our servers. See the Privacy Policy.

Are health tools medical advice?

No. BMI, calories, blood pressure, pregnancy, and child-growth tools are informational calculators only. They are not a diagnosis or a substitute for a clinician.

How is the default currency chosen?

On first install UniCalc picks a currency from your device country (SIM or region, then timezone, then language). You can change it any time in Settings.

Which themes and precision are supported?

Light, dark, and system theme. Result decimal precision defaults to 2 digits and can be set from 0 to 10 in Settings.

Keep every calculator in one app

School, engineering, money, health, and daily life — without switching apps for each subject.

Get UniCalc on Android Privacy Policy