Everyday problems.Solved instantly.

Free online calculators, converters and useful web tools.
Pick a section or search for the tool you need.

Browse by section

%
Calculators

Free online calculators for percentages, finance, maths, statistics and everyday problems.

27 tools
↔
Converters

Fast unit converters for weight, distance, temperature, speed, area, pressure, energy and data.

34 tools
IP
Network

IP, DNS, subnet, ASN and network utilities for everyday troubleshooting.

16 tools
{ }
Developer

Developer utilities for JSON, XML, Base64, URLs, UUIDs, hashes, CSV and code.

20 tools
◷
Time & Date

Time and date calculators for timestamps, durations, age, week numbers and date arithmetic.

40 tools
Aa
Text

Text utilities for counting, case conversion, sorting, deduplication, cleanup and formatting.

14 tools
▣
Images

Browser-based image tools for dimensions, resizing, compression and format conversion.

6 tools
UK
UK

UK-focused VAT, contractor, salary, mileage, fuel and measurement calculators.

9 tools
US
USA

US-focused sales tax, tip, mileage, fuel economy and measurement calculators.

10 tools
www
Web

Webmaster, SEO, URL, HTTP, colour and website utility tools.

18 tools
SOC
Social

Factual TikTok, YouTube, Facebook and Instagram calculators.

30 tools
∑
Maths

Mental maths tricks, shortcuts and fast arithmetic methods.

10 tools
TEST
Device Tests

Browser-based tests for your keyboard, mouse, screen, microphone, webcam, speakers and gamepad.

10 tools
⚡ 100% FreeNo sign-up. No unnecessary steps.
🛡 Private & SecureMost tools run directly in your browser.
🚀 Fast & ReliableSimple tools designed for instant results.
▣ Works AnywhereDesktop, tablet or mobile.

Specialist Calculators

ConstructionConcrete, materials and trade calculators.AviationFlight-planning and student-pilot calculators.