Instacalc.com

Your smart, friendly calculator. Whether it's crunching numbers, stress testing formulas, or converting units/currency, Instacalc makes it easy.

Is a pocket calc too simple? Excel too much? Enter instacalc, the calc/spreadsheet sweet spot.

Here's what users have to say:

“I bleepin' love this site and I use it all the time. I especially love the simple variables and conversions.”

“For quick ad-hoc calculations I like instacalc.com because: It's quick to write. It's free. It's less prone to mistakes and easier to check than Excel.”

“An astonishing mixture between a simple calculator and a spreadsheet application.”

Instacalc lets you...

• Crunch numbers while seeing results in real-time
• Use natural language (250k + 25%)
• Use variables (profit = sales - cost)
• Use excel-style functions (SUM, AVG, PMT...)
• Use scientific and programming commands (trig, hex/bin, logical operators, if/else...)
• Share a calc permalink with anyone (no login)
• Use units (meters/feet, etc.) and currency, along with custom units
• Dozens of more features (see below)

If you login (free), the app syncs with the main instacalc.com website. Welcome to your new, favorite calculator.

Here's a few more details on features:

• Flexible Arithmetic: Easily manage calculations from "2 + 2 - 3" to complex expressions like "(3 * 5) / 2".
• Instant Roots and Powers: Compute roots and powers in a snap, from "sqrt(9)" for square roots to "5^2" for exponents.
• Master Percentages: Effortlessly calculate percentages, whether it's "5%", finding "17% of 200", or calculating "20 + 50%".
• Modulo Operations: Solve "5 mod 3" quickly, perfect for programming and mathematical proofs.
• Number Shortcuts: Speed through large numbers with shortcuts like "3.3k" or "200 million".
• Scientific Notation Made Simple: Work with large values using entries like "1.234e3" or as simple as "1e-3".
• Dynamic Variables & Rows: Create and manipulate variables "x = 9", and perform calculations across rows to streamline data analysis.
• Comprehensive Unit Conversions: Convert "15 feet into inches" or complex rates like "15 miles/hour into feet/second".
• Time and Date Wizardry: Calculate durations like "3 days in minutes" or perform timezone conversions "8pm PST in EST".
• Advanced Financial Calculations: From loan payments using "PMT(rate, nper, pv)" to calculating the internal rate of return with "IRR(values)".
• Statistical Tools: Analyze data using functions for variance "var(r1:r3)" or standard deviation "stddev(r1:r3)".
• Trigonometry and Logarithms on the Go: Solve "sin(30)" or "log(2)" for both educational and professional uses.
• Programming Made Easy: Tackle binary operations "bin(a = 3) and bin(a and b)", logical comparisons "2 * 2 > 3", and conditional statements.
• Real-Time Financial Insights: Convert currencies "15 USD in EUR" and check real-time stock prices with "STOCK(AAPL)".

Use Instacalc today and transform the way you handle calculations, whether for work, study, or daily life!