Cephalexin for Cats Dosage Calculator
Convert a veterinarian-prescribed dose.
Prescription & Medicine Inputs
Dose Conversion Summary
Example calculation3.52 mL of 25 mg/mL suspension
Prescription Conversion
× 22 mg/kg
= 88 mg
÷ 25 mg/mL
= 3.52 mL
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Illustrative medicine image; read your dispensed label. Not a calibrated measuring device.Tablet equivalents are arithmetic only. Do not split capsules or round a prescription yourself.
This tool converts a prescribed dose; it does not select treatment. Confirm formulation, interval and dosing with your veterinarian.
Clinical Reference & Administration Checks
- 1Confirm the prescribed rate and interval
- 2Verify label strength and measure the liquid
- 3Follow your veterinarian’s course and recheck plan
Treatment varies by infection and patient; no universal regimen.
Formula & Worked Example
Dose (mg) = weight (kg) × prescribed rate (mg/kg)
Liquid (mL) = dose (mg) ÷ concentration (mg/mL)
88 ÷ 25 = 3.52 mL
Frequently Asked Questions
Does this tool prescribe a dose?
No. Enter the rate, interval and formulation prescribed for this particular cat. The initial 4 kg, 22 mg/kg and 12-hour values are a worked example, not a recommended treatment.
How do I read mg per 5 mL?
Divide the milligrams on the medicine label by the stated milliliters. For example, 125 mg per 5 mL equals 25 mg/mL. Check the actual dispensed formulation; different strengths are not interchangeable by volume.
Can I split a tablet or capsule?
Tablet or capsule equivalents are arithmetic only. Do not round to a tablet fraction, open a capsule, or split a product unless the prescribing veterinarian or dispensing pharmacist confirms a suitable preparation and the exact instructions.
What if my prescription differs?
Use the actual prescription and contact your veterinarian if its rate, interval or formulation is unclear. Published references differ by infection and patient. A numerical comparison cannot establish safety or diagnose an overdose.
More calculation questions
What does this calculator calculate?
Milligrams per administration, milliliters or unit equivalents per administration, and the arithmetic total over 24 hours from the entered interval. It does not select an antibiotic or treatment duration.
Which values should I enter?
Enter a positive current weight, a prescribed positive mg/kg per-dose rate, the prescribed interval, and the medicine label strength. Do not enter a daily mg/kg total in the per-dose rate field.
What formula is used?
Dose mg = weight kg × prescribed mg/kg per dose. Liquid concentration mg/mL = label mg ÷ label mL. Liquid mL = dose mg ÷ concentration. Arithmetic daily mg = dose mg × 24 ÷ interval hours.
Why might another calculator show a different answer?
Check pounds versus kilograms, per-dose versus per-day rates, label concentration, interval and rounding. This tool does not determine whether a prescription is clinically appropriate.
Do results update immediately?
Yes. Weight, units, prescribed rate, interval and formulation update the conversion immediately. Invalid or incomplete fields clear the results and disable copying.
Is 30 mg/kg a universal maximum?
No. Ohio State’s companion-animal guide lists 15–30 mg/kg every 12 hours for a particular soft-tissue context, and a different regimen for selected systemic infections. Merck publishes a broader general table. These references are not a personalized prescription or universal safety ceiling.
How should a suspension be measured?
VCA advises shaking the liquid well and measuring carefully. Use the measuring device and preparation instructions provided with your prescription; this illustration is not a calibrated syringe.
Is this useful for budgeting or planning?
It can summarize the arithmetic daily amount of the prescribed medicine. It does not determine course length, a purchase quantity, clinical efficacy or safe administration for a particular patient.
Sources & References
Merck Veterinary ManualCephalosporin pharmacology & dose reference
VCA Animal HospitalsCephalexin administration & precautionsReference information is not institutional endorsement.
Convert a veterinarian-prescribed cephalexin per-dose rate and medicine label strength into milligrams, liquid volume or arithmetic unit equivalents.