gLP-1 dose calculator

10 mg in 1 mL = 10 mg/mL, so 2.5 mg is 0.25 mL = 25 units on a U-100 syringe.

GLP-1 medicines are titrated in steps. Pick the compound and vial; the table shows each label or trial step in units at that concentration.

search a compound or a supplier’s vial

amount in the vial

bacteriostatic water added

amount per draw

doses used in the cited label or trials:

syringe · picked to fit the draw

price, vial size and certificate correction

vial price (optional)

USD

Lowest current US offer for this size.

vial holds (optional)

Most 2–15 mg vials hold 3 mL.

measured content on the COA

From the lot certificate; it replaces the label amount.

or HPLC purity

draw 25 units

0.25 mL on a 0.3 mL U-100 syringe

concentration: 10 mg/mL
per unit: 100 mcg per unit
full draws per vial: 4
cost per draw: $17.50 · $7.00/mg

exactly on the 25 mark · 0.25 mL

the working

10 mg ÷ 1 mL = 10 mg/mL
2.5 mg ÷ 10 mg/mL = 0.25 mL
0.25 mL × 100 = 25 units on a 0.3 mL U-100 syringe
10 mg ÷ 2.5 mg = 4 → 4 full draws
$69.99 × 2.5 mg ÷ 10 mg = $17.50 per draw

If this is a prescription, the dose and volume on your pharmacy label take priority. Ask your pharmacist about any mismatch.

cheapest way to buy it · cost per draw of 2.5 mg

vendor	size	price	$/mg	per draw	checked	calculate with this vial, or view it
Nova Peptide Supply	100mg	$349.99	$3.50	$8.75	2026-11-06	view, Tirzepatide 100mg at Nova Peptide Supply, opens in a new tab
American Peptides	100mg	$428.00	$4.28	$10.70	2026-11-06	view, Tirzepatide 100mg at American Peptides, opens in a new tab
Nova Peptide Supply	60mg	$269.99	$4.50	$11.25	2026-11-06	view, Tirzepatide 60mg at Nova Peptide Supply, opens in a new tab
Nova Peptide Supply	30mg	$149.99	$5.00	$12.50	2026-11-06	view, Tirzepatide 30mg at Nova Peptide Supply, opens in a new tab
LA Peptidesfeatured partnerCOA 30.42 mg	30mg	$169.99	$5.67	$14.17	2026-11-03	view, Tirzepatide 30mg at LA Peptides, opens in a new tab
American Peptides	60mg	$390.00	$6.50	$16.25	2026-11-06	view, Tirzepatide 60mg at American Peptides, opens in a new tab
LA Peptidesfeatured partnerCOA 15.26 mg	15mg	$99.99	$6.67	$16.66	2026-11-03	view, Tirzepatide 15mg at LA Peptides, opens in a new tab
Nova Peptide Supply	10mg	$69.99	$7.00	$17.50	2026-11-06	view, Tirzepatide 10mg at Nova Peptide Supply, opens in a new tab

In-stock US offers checked in the last 7 days, before shipping. The featured partner is a paid placement and is labelled; order here is by price per mg.

updated Nov 4, 2026 · exact arithmetic, checked against 21 worked cases · prices from offers checked in the last 7 days

FDA-approved · cited sources

doses of Tirzepatide used in research

FDA-approved as Zepbound (weight reduction, OSA) and Mounjaro (type 2 diabetes); both labels start at 2.5 mg once weekly and step up by 2.5 mg after at least 4 weeks on the current dose, to a maximum of 15 mg weekly. These are the amounts specific labels and studies used, linked to each source. They are references, not recommendations; a prescription label takes priority.

Doses of Tirzepatide used in labels and published studies
source	who	amount and schedule	route
Zepbound label (FDA): 2.5 mg start, 2.5 mg steps to 5, 10 or 15 mg weekly FDA label · 2026 · 487cd7e7-434c-4925-99fa-aa80b1cc776b	Adults with obesity, or overweight with at least one weight-related condition; adults with moderate-to-severe OSA and obesity	2.5 mg → 5 mg → 7.5 mg → 10 mg → 12.5 mg → 15 mg once weekly long-term (chronic) Maintenance is 5, 10 or 15 mg weekly for weight reduction, and 10 or 15 mg for OSA. 15 mg is the label maximum, shown here as the amount; 2.5 mg is for initiation only and is not a maintenance dose. Label revised 8/2026.	subcutaneous
Mounjaro label (FDA): type 2 diabetes, 2.5 mg steps to a 15 mg maximum FDA label · 2026 · d2d7da5d-ad07-4228-955f-cf7e355c8cc0	Adults with type 2 diabetes (glycemic control; CV risk reduction in adults at high CV risk); pediatric patients 10 years and older with type 2 diabetes (maximum 10 mg weekly)	2.5 mg → 5 mg → 7.5 mg → 10 mg → 12.5 mg → 15 mg once weekly long-term (chronic) The label starts at 2.5 mg weekly and, if more glycemic control is needed, raises the dose in 2.5 mg steps after at least 4 weeks on the current dose. Maximum is 15 mg weekly in adults and 10 mg weekly in pediatric patients. Label revised 8/2026.	subcutaneous
Phase 3 SURMOUNT-1 (NEJM 2022): 5, 10 or 15 mg weekly for 72 weeks phase 3 trial · 2022 · PMID 35658024	2,539 adults with BMI 30 or higher (or 27 or higher with a weight-related complication), without diabetes	2.5 mg → 5 mg → 7.5 mg → 10 mg → 12.5 mg → 15 mg once weekly 72 weeks (including a 20-week dose-escalation period) Steps shown are for the 15 mg arm; the 5 mg and 10 mg arms stopped escalating at their target (start 2.5 mg, plus 2.5 mg every 4 weeks, per NCT04184622). Mean weight change at week 72 was -15.0% (5 mg), -19.5% (10 mg) and -20.9% (15 mg), vs -3.1% with placebo.	subcutaneous

Sources checked Nov 4, 2026.

label and trial steps in syringe units

GLP-1 steps in units

Cagrilintide 5mg in 2 mL

Cagrilintide 5mg in 2 mL: steps in units
step	mL	U-100 units
2.4 mg	0.96	96
0.6 mg	0.24	24
1.2 mg	0.48	48

Phase 3 REDEFINE 1 (NEJM 2025): cagrilintide 2.4 mg weekly monotherapy arm

Liraglutide 5mg in 1 mL

Liraglutide 5mg in 1 mL: steps in units
step	mL	U-100 units
0.6 mg	0.12	12
1.2 mg	0.24	24
1.8 mg	0.36	36
2.4 mg	0.48	48
3 mg	0.6	60

Saxenda label (FDA): weekly titration to 3 mg daily

Mazdutide 10mg in 1 mL

Mazdutide 10mg in 1 mL: steps in units
step	mL	U-100 units
2 mg	0.2	20
4 mg	0.4	40
6 mg	0.6	60
9 mg	0.9	90

Phase 3 GLORY-1 (NEJM 2025): 6 mg weekly arm

Retatrutide 15mg in 1 mL

Retatrutide 15mg in 1 mL: steps in units
step	mL	U-100 units
12 mg	0.8	80
2 mg	0.1333	13.33
4 mg	0.2667	26.67
8 mg	0.5333	53.33

Phase 3 TRIUMPH-1 (NEJM 2026): 4, 9 or 12 mg weekly for 80 weeks

Semaglutide 5mg in 2 mL

Semaglutide 5mg in 2 mL: steps in units
step	mL	U-100 units
0.25 mg	0.1	10
0.5 mg	0.2	20
1 mg	0.4	40
1.7 mg	0.68	68
2.4 mg	0.96	96
2 mg	0.8	80

Wegovy label (FDA): 16-week titration to 2.4 mg weekly

Survodutide 6mg in 1 mL

Survodutide 6mg in 1 mL: steps in units
step	mL	U-100 units
6 mg	1	100
0.3 mg	0.05	5
0.6 mg	0.1	10
0.9 mg	0.15	15
1.2 mg	0.2	20
1.8 mg	0.3	30
2.4 mg	0.4	40
3.3 mg	0.55	55

Phase 3 SYNCHRONIZE-1 (NEJM 2026): up to 6.0 mg weekly for 76 weeks

Tirzepatide 15mg in 1 mL

Tirzepatide 15mg in 1 mL: steps in units
step	mL	U-100 units
2.5 mg	0.1667	16.67
5 mg	0.3333	33.33
7.5 mg	0.5	50
10 mg	0.6667	66.67
12.5 mg	0.8333	83.33
15 mg	1	100

Zepbound label (FDA): 2.5 mg start, 2.5 mg steps to 5, 10 or 15 mg weekly

the arithmetic

formulas

concentration = amount in the vial ÷ water added (mg/mL)
mL per draw = amount per draw ÷ concentration
syringe units = mL × 100 (U-100) or × 40 (U-40)
water to add = vial amount × units ÷ (amount per draw × 100)
cost per draw = vial price × amount per draw ÷ vial amount

Worked: 10 mg ÷ 2 mL = 5 mg/mL; 0.25 mg ÷ 5 = 0.05 mL; × 100 = 5 units.

what the numbers mean · where they come from

terms and sources

Label amount or measured amount. The calculator starts from the amount printed on the vial. A lot certificate’s measured content (net peptide content, in mg) can replace it for the vial that was tested. HPLC purity is a share of peak area, not a mass, so a purity-only correction is shown as an estimate. See HPLC, certificate of analysis and how to read a peptide COA.
Concentration. Amount in the vial ÷ water added. Terms: reconstitution, bacteriostatic water, lyophilized.
Syringe units. A volume: 0.01 mL per unit on a U-100 syringe, 0.025 mL on U-40. Units say nothing about the compound until the concentration is known.
Cost per draw. Vial price × amount per draw ÷ vial amount, from the price per mg of a current offer. Offers come from the Tirzepatide price comparison; certificates from the COA library.

Arithmetic only, on the numbers entered. Amounts from labels or trials are cited references, not recommendations; PeptideTech does not give personal use instructions and does not test products.

short answers

Tirzepatide calculator questions

How many units is 2.5 mg of tirzepatide?

It depends on the vial: 10 mg in 1 mL is 10 mg/mL, so 2.5 mg is 25 units; 10 mg in 2 mL is 5 mg/mL, so 2.5 mg is 50 units on a U-100 syringe.

How many units is 0.25 mg of semaglutide?

At 5 mg in 2 mL (2.5 mg/mL) 0.25 mg is 10 units; at 5 mg in 1 mL (5 mg/mL) it is 5 units.

What are the label titration steps?

Wegovy titrates semaglutide 0.25, 0.5, 1, 1.7 and 2.4 mg weekly; Zepbound titrates tirzepatide from 2.5 mg in 2.5 mg steps every 4 weeks up to 15 mg. The table cites each label.

more calculators

Volume and concentration arithmetic for laboratory reconstitution; not medical advice. API: /api/calc. Syringe scales: 0.3 mL U-100, 0.5 mL U-100, 1 mL U-100, 0.5 mL U-40, 1 mL U-40, 1 mL syringe, 3 mL syringe.