Universal Calculator
Online calculator for arithmetic operations, percentages, and precise calculations with large numbers.
Settings:
Hints
(3 + 5) × 2 − 1
200 × 15% → 30
(1 + 2) × (3 + 4)
1e18 + 1e18
2.5e-8 × 4
0.1 + 0.2 → 0.3 ✓
Click an example to insert it into the calculator. Supports +, −, ×, ÷, (, ), %.
Online Calculator for Precise Computations
The universal calculator helps you quickly perform arithmetic operations, calculate percentages, and work with large numbers. It is suitable for everyday, financial, technical, and educational calculations.
Frequently Asked Questions
What is 15% of 2500?
Go to the Percentages tab and select "What is X% of Y?". X = 15, Y = 2500. Answer: 375.
By what percentage is 120 greater than 100?
Use the scenario "X is what % of Y?". X = 120, Y = 100. Answer: 120%.
What is 0.1 + 0.2?
Enter 0.1+0.2 into the calculator. Answer: 0.3 (no rounding error).
How to calculate 1000000000000000000 × 25?
Enter 1e18*25 in the calculator field or in the Large Numbers block. Answer: 2.5e19.
How to write a large number in scientific notation?
Go to the Large Numbers tab and enter a number — the calculator will show it in three formats: plain, with separators, and in scientific notation.