Rebar Calculator
Estimate the total length of rebar needed for a concrete slab based on a grid layout.
Total Rebar Needed (feet): -
This is an estimate. It is recommended to add 10-15% for overlap and waste.
Use this rebar calculator, reinforcing bar calculator, rebar estimation, steel reinforcement calculator, concrete rebar calculator calculator for quick, clear estimates. Try a tiny example to see the impact of each input.
Frequently Asked Questions
Q: What is rebar used for?
Rebar, or reinforcing bar, is primarily used to provide tension resistance to concrete structures, as concrete is strong in compression but weak in tension.
How do you calculate rebar weight?
Rebar weight can be calculated using a formula that considers the diameter and length of the bar, often expressed as (D^2 / 162) L, where D is the diameter in mm and L is the length in meters, or by using charts that list weight per unit length for different bar sizes.
What are common rebar sizes?
Common rebar sizes are typically denoted by numbers (e.g., #3, #4, #5), which correspond to their diameter in eighths of an inch. For example, a #4 rebar has a diameter of 4/8 or 1/2 inch.
Why is rebar placed in concrete?
Rebar is placed in concrete to enhance its tensile strength, prevent cracking, and provide structural integrity, especially in areas subjected to bending or pulling forces.