Injection Calculators & Tools

Free tools for reconstitution maths, dose volume, blending and cycle planning. No sign-up, nothing stored - the maths runs entirely in your browser.

Dose Volume Calculator Turn vial strength, bacteriostatic water and your target dose into the exact millilitres and insulin-syringe units to draw. Open IU Calculator Work out dose volume for IU-marked peptides like HGH, converting IU to milligrams using your vial's potency. Open Blending Calculator Plan a multi-peptide blend in a single vial and see each dose drawn on a visual syringe. Open Cycle Planner Plan by duration to lay out a titration schedule, or plan by supply to see how long your vials will last. Open HGH Calculator Convert an HGH vial's IU and your target dose into the millilitres and units to draw. Open

Which calculator should I use?

Reach for the Dose Volume Calculator for standard reconstitution - a vial measured in milligrams, bacteriostatic water added, and you want the units to draw for a given dose. Use the IU Calculator when your vial is marked in international units rather than milligrams, as HGH usually is. The Blending Calculator is for combining more than one peptide in a single vial, showing each one's draw separately. The Cycle Planner maps a course over time - either by duration to lay out a titration schedule, or by supply to see how long the vials you have will last. The HGH Calculator covers HGH specifically, from vial IU to the volume and units to draw.

How the reconstitution maths works

Every reconstitution comes down to three steps. First, concentration: divide the vial's strength by the volume of bacteriostatic water you add - a 10 mg vial in 2 mL of water is 5 mg/mL. Second, volume: divide your target dose by that concentration to get the millilitres to draw. Third, units: on a U-100 insulin syringe, multiply the millilitres by 100 to read the unit markings, so 0.25 mL is 25 units. The calculators do this for you and validate each input, so an obvious slip is caught before you draw.

Frequently asked questions

Are these calculators free?

Yes. Every tool is free to use, with no sign-up and no account required.

Is any of the information I enter stored or sent anywhere?

No. The maths runs entirely in your browser. Nothing you type is transmitted to us or saved on our servers.

Do these tools give medical or dosing advice?

No. They perform arithmetic on the numbers you enter and do not recommend a dose or a protocol. Always confirm your vial concentration, syringe type and dosing plan with your prescriber or pharmacist.

Which syringe do the results assume?

Unit results assume a U-100 insulin syringe, where 1 mL equals 100 units. Check the markings on your own syringe before drawing.