Life & fun · alternatives · 2026
24 alternatives to Unsure Calculator – back-of-a-napkin probabilistic calculator
The Unsure Calculator is an online tool that lets you calculate with numbers you’re not sure about.
Unsure Calculator is a probabilistic calculator designed for quick, informal estimations. It allows users to input uncertain values and perform calculations with ranges rather than fixed numbers, making it useful for… Below are 24 products that do a similar job, ranked by how close each is in meaning and then by launch-day votes.
- 1
Calculate uncertainties easily with this calculator - Just use it like a normal one!
2014 · ollyfg.github.io · its alternatives →
- 2
Guesstimate▲286A spreadsheet for things that aren't certain
2015 · getguesstimate.com · its alternatives →
- 3
Learn more about sales w/ this free game
2024 · objections.dog · its alternatives →
- 4
- 5IM
Hello HN! I'm happy to release this project today. It's a bidirectional calculator (hence the name bidicalc). I've been obsessed with the idea of making a spreadsheet where you can update both inputs and outputs, instead of regular spreadsheets where you can only update inputs. Please let me know what you think! Especially if you find bugs or good example use cases.
Dec 2025 · victorpoughon.github.io · its alternatives →
- 6II
A simple calculator for decisions
2020 · isitworththecost.com · its alternatives →
- 7
- 8SI
2021 · shouldigetahouse.com · its alternatives →
- 9
Simple Qt-based programming calculator. Contribute to fellerts/procal development by creating an account on GitHub.
2023 · github.com · its alternatives →
- 10
A Simple & Gorgeous Android Calculator for Everyday Use
2021 · play.google.com · its alternatives →
- 11IT
2015 · incometaxcalculator.net.in · its alternatives →
- 12AT
2018 · uncertain.io · its alternatives →
- 13
Determine what score you need on your final exam 💯
2018 · finalgradecalc.com · its alternatives →
- 14
Implementing a calculator with normal ranges, embedded in Haskell, using a simplified probability monad.
2025 · alt-romes.github.io · its alternatives →
- 15
- 16AB
2020 · saasformulas.com · its alternatives →
- 17
Trusted by Nobody 🗿
Jun 2026 · justasimplecalculatorr.netlify.app · its alternatives →
- 18
Transparent calculators for practical decisions
Aug 2026 · trustycalculator.com · its alternatives →
- 19
- 20
Intrinsic Value Calculator.
2021 · play.google.com · its alternatives →
- 21DC
2019 · app.fastgarden.io · its alternatives →
- 22
Calculate Five-Number Summaries for Complex Datasets
2025 · fivenumbersummary.io · its alternatives →
- 23RT
2015 · ramadan-time.github.io · its alternatives →
- 24
100% free, reliable & accurate calculators
Nov 2025 · technical-calculator.com · its alternatives →
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Ranked by how close each launch is in meaning, then by votes. Prices were read from each product’s own site when checked and can change. Refine with your own description →