What formula does this calculator use?

It uses the Meeh formula: BSA (cm²) = 10.1 × W(g)^0.667, where W is the dog's weight in grams. This is the standard formula cited in veterinary oncology references such as the Veterinary Co-operative Oncology Group (VCOG) guidelines.

Why is BSA used instead of body weight for dosing?

BSA-based dosing is preferred for cytotoxic drugs because metabolic rate and drug clearance scale more reliably with surface area than with body weight alone, reducing the risk of over- or under-dosing.

Is this formula accurate for very small or very large dogs?

The Meeh formula performs well across most dog sizes. For dogs under 2 kg or over 60 kg, consult a veterinary oncologist, as allometric relationships may differ at the extremes and protocol-specific adjustments may apply.

How do I convert the BSA result to a drug dose?

Multiply the BSA in m² by the drug dose per m² specified in your chemotherapy protocol. For example, if doxorubicin is dosed at 30 mg/m² and BSA = 0.85 m², the dose is 0.85 × 30 = 25.5 mg.

Does the calculator store my inputs?

No data is sent to any server. All computation happens in your browser. Nothing is stored or logged.

Dog BSA Calculator

Enter your dog's weight to instantly calculate body surface area (BSA) in m² using the standard Meeh formula used in veterinary oncology and fluid therapy.

Dog Weight

Body Weight

Formula (Meeh)

BSA (cm²) = 10.1 × W_(g)^0.667

W in grams | divide by 10,000 for m²

Results

Enter weight and click Calculate

Copied!

Summary

This calculator computes a dog's body surface area (BSA) using the Meeh formula (BSA cm² = 10.1 × W_g^0.667), the standard equation in veterinary oncology. Enter weight in kilograms or pounds and get BSA in both cm² and m² instantly. Results support chemotherapy dosing, fluid therapy planning, and other BSA-dependent clinical calculations.

How it works

Enter your dog's body weight in kilograms or pounds.
Select the weight unit (kg or lbs).
The calculator applies the Meeh formula: BSA (cm²) = 10.1 × W(g)^0.667.
Results display in both cm² and m² for clinical use.
Use the BSA value to compute chemotherapy drug doses or fluid rates per your protocol.

Use cases

Determine BSA for chemotherapy drug dosing in canine oncology patients.
Calculate fluid therapy volumes based on body surface area.
Convert between kg and lbs while computing BSA in a single step.
Verify manual BSA calculations before administering cytotoxic agents.
Teach veterinary students the Meeh formula with an instant reference tool.
Document BSA at each visit to track changes alongside weight fluctuations.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu