Rasel Rana · Tools
Free engineering calculators & tools
Free, fast utilities for telecom, electrical and building engineers, and developers.
Runs locally in your browserBrowse by category
All tools
9 tools shown
Telecom & Networking
Optical Fiber Link Budget Calculator
Work out total link loss, power budget, link margin and maximum reach for a fiber link, with PASS / FAIL and attenuator advice.
Open toolElectrical Engineering
Rooftop Solar Calculator
Size an on-grid rooftop solar system from your roof area: equipment, itemised cost, monthly generation, savings and payback.
Open toolTelecom & Networking
IP Subnet / CIDR Calculator
Network, broadcast, host range and subnet splits for IPv4 and IPv6.
Telecom & Networking
dB / dBm / mW Converter
Convert between dB, dBm and mW, and add or subtract gain and loss.
Electrical Engineering
Cable Size Calculator
Suggest conductor size from load, voltage, length and installation method, with a voltage drop check.
Electrical Engineering
Breaker / Fuse Size Calculator
Suggest MCB / MCCB / fuse rating and trip curve from the load.
Developer Tools
JSON Formatter & Validator
Format, minify and validate JSON, showing where errors are.
Developer Tools
Base64 Encoder / Decoder
Encode and decode text to and from Base64 (UTF-8 safe).
Developer Tools
Markdown Previewer
Live preview of Markdown, with copy-as-HTML.