The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

Unsure Calculator is the most popular Self-Hosted alternative to ESBCalc.
- Unsure Calculator is Free and Open Source
ESBCalc is described as 'Freeware Scientific Calculator for Windows with Infix Notation, Brackets, Scientific Functions (Trigonometric, Hyperbolic, Logarithmic - including Base 10, Base 2 & Natural - plus more), Memory, Paper Trail, Result History List and more' and is a Calculator in the education & reference category. There are more than 50 alternatives to ESBCalc for a variety of platforms, including Android, Windows, iPhone, Mac and iPad apps. The best ESBCalc alternative is SpeedCrunch, which is both free and Open Source. Other great apps like ESBCalc are Fossify Calculator, Qalculate!, OpenCalc and Calc You.
The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.

Unsure Calculator is the most popular Self-Hosted alternative to ESBCalc.
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