Contact Rebar Calculator
Questions about rebar grids, lap splices, bar weights, or slab takeoffs? Spotted a weight table value that doesn’t match ASTM? We help concrete contractors, fabricators, inspectors, and DIYers get the numbers right before the truck shows up.
How do I get a faster reply?
Paste the exact inputs from the calculator (slab L×W, bar size, spacing, edge offset, rebar length, price unit) and tell us what output you expected. A screenshot or the page URL helps even more.
Do you offer live chat or phone?
Not yet — email lets us verify every number against the actual formulas before we reply. We read every message and answer most within two business days.
Can you review my rebar schedule?
For planning questions, yes — we can help cross-check bar counts and lap math. For engineered or permit-level designs, you'll need a licensed structural engineer or PE.
Pick the right inbox
Each email below routes to the person who can actually help — no ticket desks in between.
Calculation & Quantity Support
Rebar count not matching your takeoff? Grid spacing or lap splice math confusing? Send your slab dimensions, bar size, spacing, and edge offset — plus the result you expected versus what the calculator returned.
support@rebar-calculator.comFeature Requests & Ideas
Need more project types (grade beams, caissons, pile caps), metric defaults, PDF rebar schedules, or better imperial-to-metric switching? We build around what concrete contractors, fabricators, and inspectors actually use on the job.
feedback@rebar-calculator.comReport a Formula or Data Error
Reinforcing steel is precise. If a weight-per-foot value, bar-size diameter, spacing formula, or guide reads differently than ASTM A615 or your local code, send the page URL and the exact numbers. We verify against ACI 318, CRSI, and standard span tables before correcting.
corrections@rebar-calculator.comPartnerships & Trade Education
Ready-mix companies, rebar fabricators, building-supply yards, trade schools, and concrete-inspection firms — we are open to white-label licensing, classroom integrations, supplier-price feeds, and tool integrations.
partners@rebar-calculator.comResponse Time
Most messages answered within two business days. For the fastest reply, include:
- Browser & device (for UI glitches)
- Exact inputs: slab L×W, bar #, spacing, edge offset
- Result you expected vs. result shown
- Page URL or section title if content is off
Find answers without email
Most rebar questions are already covered in our step-by-step guides and reference tables.
Still need a human?
Send us the numbers, a screenshot, or the rebar schedule — we’ll work through the math with you.
support@rebar-calculator.com