Best Telegram bots for Converters & calculators

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.

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.

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 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.

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.

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.

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.

A lightweight inline calculator that also remembers variables — set x = 5 once, then reuse x in later expressions across any chat.