How to use the covalent bond length estimate calculator
Estimate a covalent bond length by adding the covalent radii of two atoms. Enter covalent radius of atom a, covalent radius of atom b in the fields above; the estimated bond length are computed instantly and plotted on the chart so you can see how the answer changes.
Common searches this calculator answers include “bond length estimate”, “covalent radius sum”, “how long is the bond”, “calculate covalent bond length estimate”, “find estimated bond length”.
Formula
Variables
- rA — Covalent radius of atom A (pm)
- rB — Covalent radius of atom B (pm)
Worked example
With covalent radius of atom a = 77 pm, covalent radius of atom b = 75 pm, the calculator gives estimated bond length ≈ 152 pm; estimated bond length ≈ 0.152 nm.
Frequently asked questions
What is the covalent bond length estimate calculator used for?
Estimate a covalent bond length by adding the covalent radii of two atoms. It helps with questions such as “bond length estimate”, “covalent radius sum”, “how long is the bond”.
What is the formula for the covalent bond length estimate calculation?
Estimated bond length (pm) = rA+rB. Estimated bond length (nm) = [Estimated bond length] / 1000. Here rA is covalent radius of atom a (pm), rB is covalent radius of atom b (pm).
What inputs do I need for the covalent bond length estimate calculator?
You need covalent radius of atom a in pm, covalent radius of atom b in pm. Each field is pre-filled with a typical example so you can see how the result responds as you edit the numbers.
How do I use the covalent bond length estimate calculator?
Type values into the input fields. Results and the chart update instantly. Use Reset to restore the example values, Copy results to paste them elsewhere, or Share to copy a link that preserves your inputs.
Is the covalent bond length estimate result exact?
Calculations use standard formulas and double-precision arithmetic, then display about seven significant figures. Real-world measurements carry uncertainty, so treat results as estimates unless your inputs are exact.