Fiber optic calculators,built by the people who manufacture the cable.
Two browser-based tools for planning and validating a fiber optic link. Enter your values — the results update instantly, with industry-standard formulas and the same loss presets your OLT / GPON datasheet uses. Nothing is sent to a server; everything is computed in your browser.
Pick a tool
7-step full link budget — fiber, connectors, splices, splitters, margin
Fiber Link Loss Budget Calculator
Model an end-to-end fiber link. Enter cable distance, per-km loss at your operating wavelength, connector pairs, splices, splitter and other component losses, plus transmitter power and receiver sensitivity. We compute the total cable attenuation, link loss budget, and the system performance margin you have left after the repair allowance.
- Plan a new PON or point-to-point link before ordering gear
- Validate a link against TIA-568 / ITU-T loss budgets
- Check headroom before adding splitter stages
Quick estimate — theoretical splitter loss plus excess loss
Optical Splitter Loss Calculator
A single-purpose tool for estimating the insertion loss of a passive PLC or FBT splitter. Enter the number of output ports (2, 4, 8, 16, 32, 64) and the excess loss from the splitter datasheet. We return the ideal logarithmic split loss plus the total including excess.
- Spec a PON splitter for an FTTH deployment
- Check whether a cascade of splitters still fits the budget
- Teach new techs the 10·log₁₀(N) split-loss rule
Want to understand the numbers behind the calculators?
Our Fiber Loss & Splitter cluster on the blog walks through the theory, best practices, and real-world edge cases behind every input on these pages. Start here: