Send any arithmetic expression with parentheses, like "(12+8)/4*3", and get the answer back instantly. No commands, no menus — and it already has close to 30,000 monthly users.
Best Telegram bots for Converters & calculators
Calculator and converter bots answer a quick question in the chat: a sum with parentheses, feet to metres, Fahrenheit to Celsius, a trigonometric expression pasted from a textbook. Some work inline, so the result lands in a conversation with a friend without opening the bot.
The best Telegram bot for converters and calculators is Calculator (@calculation_smart_bot): send any expression with parentheses and get the answer instantly, no commands or menus, free and used by close to 30,000 people a month. Wolfram Alpha Bot (@wolframbot) computes unit conversions and factual questions through Wolfram's engine, and UnitConversionBot (@UnitConversionBot) answers "100 ft to m" in one message, open source.
A Telegram front-end for Wolfram Alpha's computational engine — ask it a calculation, a unit conversion or a factual question with /wolfram and get a real computed answer, not a search-result link.
70 / 100
Score
A "programmable" calculator bot that understands full Python-style expressions plus the math, random, datetime, json and re modules — for anyone who wants more than basic arithmetic in a Telegram chat.
A no-frills unit converter — type something like "100 ft to m" and get an instant answer covering length, area, volume, weight, temperature, energy and speed. Free and open source.
69 / 100
Score
A bilingual English/Russian unit converter with a clean category menu — pick length, weight, temperature or another category, then convert with a couple of taps or the /units command.
69 / 100
Score
An inline calculator — type @mathcalcbot and an expression like sin(60)*sqrt(16)/.3 in any chat, and a ready-to-send result pops up without ever opening the bot itself.
67 / 100
Score
Convert a time between any two time zones with one command — "/convert 3PM GMT to PST" — and set live countdowns to future events, right inside Telegram.
63 / 100
Score
A lightweight inline calculator that also remembers variables — set x = 5 once, then reuse x in later expressions across any chat.
62 / 100
Score
Comparison
| # | Bot | Price | Languages | Inline | Groups | Score |
|---|---|---|---|---|---|---|
| 1 | Calculator @calculation_smart_bot | Free | MULTI | no | no | 71 |
| 2 | Wolfram Alpha Bot @wolframbot | Free | EN | no | no | 70 |
| 3 | Console Calculator @calcubot | Free | MULTI | no | yes | 70 |
| 4 | UnitConversionBot @UnitConversionBot | Free | EN | no | yes | 69 |
| 5 | Converter Bot @converter_robot | Free | EN · RU | no | no | 69 |
| 6 | Calculator bot @mathcalcbot | Free | MULTI | yes | no | 67 |
| 7 | Timezone Bot @the_timezone_bot | Free | EN | no | no | 63 |
| 8 | Math bot @qalcbot | Free | MULTI | yes | no | 62 |
Neighbouring subtopics
How we chose
Each bot received the same ten inputs: arithmetic with nested parentheses, a percentage, a unit conversion with a typo, a temperature, a currency-like question it should refuse, a trigonometric expression and a date difference. We checked correctness, whether the bot understands both "100 ft to m" and "100 футов в метры", response time, inline support and whether it shows advertising. Currency rates are a separate rating and were not scored here.
Converters & calculators
Plain arithmetic or a computational engine
For everyday sums a bot that takes an expression and returns a number, like Calculator or the inline @mathcalcbot, is all you need. Console Calculator goes further with Python-style expressions and modules for dates, random numbers and JSON, useful for developers and students. Wolfram Alpha Bot is a different class: it computes conversions, solves equations and answers factual questions with real data, at the cost of a /wolfram command and English input.
Units and languages
Unit converters differ in how they take input. UnitConversionBot understands free text like "100 ft to m"; Converter Bot offers a menu of categories in English and Russian, which is slower but works when you do not remember the abbreviation. Both cover length, weight, temperature, volume, area, speed and energy; cooking measures and clothing sizes are rarer.
Inline calculators
An inline bot such as @mathcalcbot lets you type the expression in any chat and send the result without opening the bot: handy for splitting a bill in a group. Check the result before sending, inline previews sometimes truncate long expressions. For currency conversion at live rates use the currency rates rating; calculators here use fixed factors only.
Frequently asked questions
Which bot solves expressions with parentheses?
Calculator (@calculation_smart_bot) and Console Calculator handle nested parentheses; @mathcalcbot does it inline.
Can I convert units by typing "100 ft to m"?
Yes, UnitConversionBot understands free text; Converter Bot uses a category menu in English and Russian.
Do these bots convert currencies?
Not at live rates; use a bot from the currency rates rating for that.
Is there a calculator that works inside any chat?
@mathcalcbot: type its name and an expression in the message field and send the result.