Worldwide rebar weight calculator
Calculate rebar quantities and weights from a bar schedule - enter mark, diameter, length and quantity for each bar, and see the total weight, grouped by diameter, as a bundle you can read at a glance.
The Schedule tab's rebar bundle and running totals, the Breakdown tab's weight share by diameter, and the Guide tab's standard bar diameter reference table.
Schedule tab - bar schedule and rebar bundle
Breakdown tab - weight share by diameter
Guide tab - standard bar diameter reference
The headline visual draws your schedule as a bundle of cross-sections, one row per diameter, thickest first - a physical reading of what's on order, not just a table.
Add as many rows as you need - mark, diameter, length and quantity - with weight calculated per row and rolled up into running totals as you type.
See bar count, length and weight for every diameter in the schedule, plus a weight-share bar showing which size dominates the total tonnage.
A built-in reference table of standard bar diameters and their nominal mass per metre, with typical-use notes for anyone unfamiliar with bar sizing.
Weight per row uses diameter squared divided by 162 - the standard steel reinforcement formula, matching the figures on any standard rebar weight table.
Copy a plain-text summary or export it as a standalone HTML file. Light/dark theme remembers your choice, and rotating sample schedules let you explore the app.
Tekla Structures is a well-known professional BIM package used for full 3D reinforcement detailing. It's built for structural detailers on complex jobs, not a quick bar-schedule check on site - here's how a focused, one-off tool compares.
| Feature | Rebar Weight Calculator | Tekla Structures |
|---|---|---|
| Pricing model | One-off purchase after a free trial | Enterprise licence, roughly $2,500-$8,000+ per seat |
| Works fully offline | ✓ | ✓ |
| Instant standalone bar-schedule/weight check | ✓ | ✕ |
| Full 3D reinforcement detailing & clash detection | ✕ | ✓ |
| Standard nominal mass formula, quick diameter breakdown | ✓ | ~ |
| Built for a site manager/estimator rather than a structural detailer | ✓ | ✕ |
| Requires specialist training | ✕ | ✓ |
| Cost scales with the size/complexity of the job | ✕ | ✕ |
Comparison based on Tekla Structures' publicly listed pricing and features as of August 2026 (softwarefinder.com, capterra.com, saasworthy.com) - pricing and features change over time, so check tekla.com for current details. Tekla Structures is a trademark of its respective owner; this comparison is for informational purposes and isn't sponsored by or affiliated with Trimble/Tekla.
Four bar marks from a small reinforced-concrete job, weighed with the standard diameter² ÷ 162 kg/m formula and broken down by diameter for ordering.
A 12 mm bar weighs 12² ÷ 162 = 0.889 kg per metre, so C1 is 0.889 × 5.4 × 60 = 288 kg. That nominal-mass method is what merchants price on; laps, bends and cover still come from the engineer's bar bending schedule, which this is not a replacement for. Open the browser edition to try it with your own figures.
No - use it straight from your browser, on a phone, tablet or PC, with no sign-up. It works offline once it has loaded, and you can add it to your home screen or desktop like an app. There is also a Windows desktop version in the Microsoft Store if you prefer an installed app.
Yes. Metre2 uses one account across the whole Keystone lineup - Vector, Forma, Rebar Weight Calculator and everything else - so you only sign in once.
The standard nominal mass formula for steel reinforcement: diameter squared divided by 162, giving kilograms per metre. This matches the figures on standard rebar weight tables.
No - it's a nominal mass calculation from mark, diameter, length and quantity, not a substitute for a structural engineer's bar bending schedule. Always confirm laps, bends and cover with the project's actual RC design.