About PlumberCalc.com
Free plumbing calculators built to save time on common job site calculations.
Why I Built This
I'm Krzysztof, a software developer with family and friends in the trades. I kept watching them pull out calculators for the same calculations - pipe sizing, flow rates, pressure drops - multiple times per job.
These tools use standard plumbing formulas and industry references, just packaged in a way that's faster to use on job sites. No hunting through handbooks or doing repetitive math by hand.
The calculations are based on established engineering principles and plumbing codes, but they're meant to speed up work you already know how to do, not replace professional judgment.
Important: These are calculation tools to assist with estimates and preliminary work. Always verify results and check local codes before actual construction.
Help Keep This Free
I've spent hours building PlumberCalc.com and it's completely free for everyone. No annoying ads cluttering your screen, no selling your data to third parties, no premium subscriptions for "advanced" features.
But here's the reality - hosting these tools isn't free. Every calculation you run, every page you load costs money to serve. If PlumberCalc has saved you time on a job or helped you avoid a costly mistake, consider supporting the project.
Support PlumberCalc
Your support keeps the servers running and motivates me to build more tools for the trades.
Buy me a coffeeImportant Disclaimers
Professional Verification Required
These calculators provide estimates for preliminary work. Always have results verified by qualified professionals before construction.
Not Engineering Services
This website provides calculation tools, not professional engineering services. For system design and code compliance, consult a licensed engineer.
Local Codes Take Precedence
Local building codes and regulations always override general calculations. Check with your local inspector when in doubt.