How to use it
- Enter rebar length in meters.
- Enter diameter in millimeters.
- Enter the number of pieces.
- Click Calculate to see total weight in kg.
What it does – The Rebar Calculator turns the three basic inputs of any steel bar project (length, diameter, quantity) into the total mass you’ll need to order. Knowing the exact kilogram amount helps you avoid over‑ordering, reduces waste, and ensures your structural calculations are spot‑on. Why it matters – Shipping costs, crane capacity, and concrete mix design all depend on precise steel weight. How to read the result – The displayed number is the combined weight of all pieces in kilograms; round up if you need a safety margin. No hidden steps, no guesswork – just plug the numbers and get an instant, reliable total. You can also export the figure to your procurement sheet or feed it into structural analysis software. The calculator respects the industry‑standard steel density of 7850 kg/m³ and a unit weight constant of 0.006165 kg per meter per mm², so the result matches engineering tables.
Pro tips
- Add 5‑10 % extra for cutting losses.
- Round diameter to the nearest standard size before entering.
- Check local code for minimum reinforcement weight.
- Verify that quantity includes splices and bends.
Real-life examples
- A contractor estimating steel for a 30 m concrete wall.
- A site engineer checking crane load limits for rebar deliveries.
- A DIY homeowner planning the reinforcement for a garage slab.
Case study
John, a small‑business contractor, was ordering rebar for a 100 m³ foundation. He entered 12 m length, 16 mm diameter, 250 pcs and got 372 kg. With the exact weight, he ordered the right amount, saved $1,200 on freight, and finished on schedule.