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Injectable Calculators
All InjectBuddy calculators are free, run entirely in your browser, and require no login. No health data is ever sent to any server.
9calculators
4categories
0data stored
TRT & Hormone Therapy
TRT
TRT Dose Calculator
Enter your weekly testosterone dose and vial concentration — get your exact draw volume in mL and insulin units. Supports any injection frequency.
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TRT
TRT & EOD Calculator
Every-other-day protocol calculator. Calculates per-injection dose and volume for EOD or any split frequency from your prescribed weekly total.
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GLP-1 Weight Loss Medications
GLP-1
Semaglutide Dosage Calculator
Calculate your semaglutide draw volume in mL and insulin units from your prescribed dose (mg) and vial concentration. Works with compounded vials.
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GLP-1
Tirzepatide Dosage Calculator
Calculate your tirzepatide draw volume from your prescribed dose and vial concentration. Supports all standard dose escalation levels.
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Peptide Calculators
Peptide
Peptide Reconstitution Calculator
Calculate how much BAC water to add to your peptide vial to reach your target concentration. Enter vial size (mg) and desired mg/mL to get the exact mL of water.
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Peptide
Peptide Dosage Calculator
Calculate your peptide injection volume in mL and insulin units from your prescribed dose (mcg or mg) and reconstituted concentration.
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Peptide
BPC-157 Dosage Calculator
Calculate BPC-157 draw volume in mL and units from your dose (mcg), vial size, and BAC water volume. Includes vial duration estimate.
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Peptide
BPC-157 + TB-500 Blend Calculator
Calculate draw volumes for combined BPC-157 and TB-500 blends. Accounts for individual peptide ratios and combined vial concentration.
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Body Composition
Body
BMI Calculator
Calculate your Body Mass Index from height and weight. Displays WHO category (underweight, normal, overweight, obese) with metric and imperial support.
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Body
Free Testosterone Index Calculator
Calculate your Free Androgen Index (FAI) from total testosterone and SHBG lab values. Useful for interpreting bloodwork during TRT.
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Related resources
Pair these calculators with our dosing and protocol guides for step-by-step injection walkthroughs, dose escalation schedules, and storage guidance.