RapidTables alternatives
RapidTables mixes calculators, unit and number converters and reference tables, so the right alternative depends on what you used it for: electrical and everyday math, unit conversions, or programmer conversions like hex and binary. Compare how many ads each site shows, whether it does the math in your browser, and whether it shows the working.
We make BrowserUtils, one of the sites below. Facts checked .
| Name | Runs where | Sign-up | Price |
|---|---|---|---|
| BrowserUtilsOurs | In the browser | Not needed | Free |
| Omni Calculator | In the browser | Optional | Free |
| Calculator.net | Browser and server | Optional | Free |
| UnitConverters.net | In the browser | Not needed | Free |
| CalculatorSoup | Browser and server | Not needed | Free |
| Wolfram|Alpha | On their servers | Optional | Free; Pro from $5/mo (billed annually) |
BrowserUtils
OursA developer toolkit rather than a calculator site: it covers RapidTables' programmer pages (number bases, hex and binary calculators, HEX/RGB/HSL colors, ASCII and Unicode tables), a scientific and a percentage calculator and ten unit converters, and adds JSON, Base64, regex and timestamp tools. It has no electrical, financial, health or grade calculators, and its converters don't show working steps.
Best for: Programmers who used RapidTables for hex, binary, ASCII and color lookups
- In the browser
- No sign-up
- No third-party ads
- Web, works on mobile
- Not open source
- Free
- 299 tools
3,938 calculators across math, physics, finance, health, conversion and more, including electrical ones such as Ohm's law, computed in the page and paired with an article explaining the formula. Pages carry heavy ads, including a video player.
Best for: Finding a calculator for almost any formula
- In the browser
- Sign-up optional
- Heavy ads
- Web
- Not open source
- Free
- 3,938 calculators tools
Around 200 calculators for finance (mortgage, loan, retirement), fitness and health (BMI, calorie, body fat), math and everyday use, plus a unit conversion calculator, with one display ad per page and an optional account to save calculations. Most calculators compute the result on its server when you submit the form.
Best for: Finance, health and everyday math with light ads
- Browser and server
- Sign-up optional
- Some ads
- Web
- Not open source
- Free
- Around 200 calculators tools
About 75 unit converters, from length and weight to torque, thermal, electrical, magnetic and radiation units, plus single-pair pages such as inches to cm with a conversion table, all running in your browser with one display ad per page. It converts units only and has no calculators.
Best for: Unit conversions, including obscure engineering units
- In the browser
- No sign-up
- Some ads
- Web
- Not open source
- Free
- About 75 unit converters tools
About 400 calculators for math, algebra, fractions, statistics, finance and physics, many of which show the solution step by step. Most post your numbers to its server, and pages carry heavy programmatic ads, including sticky units.
Best for: Math homework where you need to see the steps
- Browser and server
- No sign-up
- Heavy ads
- Web
- Not open source
- Free
- About 400 calculators (our count) tools
A computational engine that answers typed questions and expressions across math, units and measures, physics, engineering and finance, computed on Wolfram's servers. Answers are free; step-by-step solutions need Pro, from $5 a month billed annually.
Best for: Questions that don't fit a ready-made calculator
- On their servers
- Sign-up optional
- No ads
- Web and mobile apps
- Not open source
- Free; Pro from $5/mo (billed annually)
BrowserUtils vs RapidTables
| Fact | RapidTables | BrowserUtils |
|---|---|---|
| Runs where | In the browser | In the browser (1 tool needs a server and is labeled) |
| Sign-up | Not needed | Not needed |
| Ads | Heavy | No third-party ads (one small note per page about our own products) |
| Platform | Web | Web, works on mobile |
| Open source | No | No |
| Price | Free | Free |
| Tools | 1,000+ calculator and converter pages (our count) | 299 |
Checked
Where RapidTables is better
- About 50 electrical and wiring calculators (Ohm's law, amps to kW, voltage drop, wire gauge) that BrowserUtils doesn't have.
- Everyday and school calculators outside programming: mortgage, compound interest, GPA, final grade and BMI.
- Number converters show the working: the hex to decimal page prints calculation steps, a signed two's-complement result and a conversion table. BrowserUtils' base converter shows only the results.
- Hundreds of single-pair conversion pages, such as inches to cm, each with the formula, a worked example and a lookup table.
Where BrowserUtils is better
- Covers developer work RapidTables doesn't: JSON, YAML, XML and SQL formatters, JWT decoding, regex testing, hashing and Unix timestamp conversion.
- No third-party ads. RapidTables pages load Snigel ad units in the sidebar, at the bottom and in a sticky banner.
- Paste a timestamp, color, JWT or JSON into the homepage box (or the ⌘K palette on any page) and it opens the matching tool with your input filled in.
- Developer number tools RapidTables lacks: a bitwise calculator, IP-to-decimal and CIDR calculators, and byte and data-rate converters.
Tools on both
Discussion
Try BrowserUtils, free.
299 tools. No sign-up. Almost all of them run entirely in your browser.
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