Scientific Calculator

Use this online scientific calculator with accurate double-digit precision — works with both clicks and keyboard input!

Standard Deviation Calculator

Use this free calculator to quickly find the standard deviation, variance, mean, total, and margin of error for your data.

401k Calculator

This calculator assumes that the year you retire, you do not make any contributions to your 401(k).

1099 Tax Calculator

Estimate your 1099 self-employed taxes easily with our free calculator. Input your income, expenses, and instantly get your result.