Insulin Syringe Units to mL Converter
U-100 and U-40 · chart from 1 to 100 units · units → mcg
In short: on a U-100 insulin syringe, 100 units = 1 ml. Divide units by 100 to get ml: 10 units = 0.1 ml, 30 units = 0.3 ml, 50 units = 0.5 ml, 80 units = 0.8 ml. This holds on every U-100 syringe regardless of barrel size (0.3, 0.5 or 1 ml). On a U-40 syringe, 40 units = 1 ml, so divide by 40 instead.
Converter
On a U-100 syringe, 100 units = 1 ml, so 1 unit = 0.01 ml.
Optional: how many mcg is that? (enter how the vial was mixed)
Each unit carries 25.0 mcg, so 10 units = 250 mcg.
Units to ml chart (U-100)
Every unit from 1 to 20, then in steps of 5. The last column shows which syringe sizes can hold that dose.
| Units | Milliliters | U-40 equivalent | Fits on syringe |
|---|---|---|---|
| 1 units | 0.01 ml | 0.4 units | 0.3 / 0.5 / 1 ml |
| 2 units | 0.02 ml | 0.8 units | 0.3 / 0.5 / 1 ml |
| 3 units | 0.03 ml | 1.2 units | 0.3 / 0.5 / 1 ml |
| 4 units | 0.04 ml | 1.6 units | 0.3 / 0.5 / 1 ml |
| 5 units | 0.05 ml | 2 units | 0.3 / 0.5 / 1 ml |
| 6 units | 0.06 ml | 2.4 units | 0.3 / 0.5 / 1 ml |
| 7 units | 0.07 ml | 2.8 units | 0.3 / 0.5 / 1 ml |
| 8 units | 0.08 ml | 3.2 units | 0.3 / 0.5 / 1 ml |
| 9 units | 0.09 ml | 3.6 units | 0.3 / 0.5 / 1 ml |
| 10 units | 0.10 ml | 4 units | 0.3 / 0.5 / 1 ml |
| 11 units | 0.11 ml | 4.4 units | 0.3 / 0.5 / 1 ml |
| 12 units | 0.12 ml | 4.8 units | 0.3 / 0.5 / 1 ml |
| 13 units | 0.13 ml | 5.2 units | 0.3 / 0.5 / 1 ml |
| 14 units | 0.14 ml | 5.6 units | 0.3 / 0.5 / 1 ml |
| 15 units | 0.15 ml | 6 units | 0.3 / 0.5 / 1 ml |
| 16 units | 0.16 ml | 6.4 units | 0.3 / 0.5 / 1 ml |
| 17 units | 0.17 ml | 6.8 units | 0.3 / 0.5 / 1 ml |
| 18 units | 0.18 ml | 7.2 units | 0.3 / 0.5 / 1 ml |
| 19 units | 0.19 ml | 7.6 units | 0.3 / 0.5 / 1 ml |
| 20 units | 0.20 ml | 8 units | 0.3 / 0.5 / 1 ml |
| 25 units | 0.25 ml | 10 units | 0.3 / 0.5 / 1 ml |
| 30 units | 0.30 ml | 12 units | 0.3 / 0.5 / 1 ml |
| 35 units | 0.35 ml | 14 units | 0.5 / 1 ml |
| 40 units | 0.40 ml | 16 units | 0.5 / 1 ml |
| 45 units | 0.45 ml | 18 units | 0.5 / 1 ml |
| 50 units | 0.50 ml | 20 units | 0.5 / 1 ml |
| 55 units | 0.55 ml | 22 units | 1 ml |
| 60 units | 0.60 ml | 24 units | 1 ml |
| 65 units | 0.65 ml | 26 units | 1 ml |
| 70 units | 0.70 ml | 28 units | 1 ml |
| 75 units | 0.75 ml | 30 units | 1 ml |
| 80 units | 0.80 ml | 32 units | 1 ml |
| 85 units | 0.85 ml | 34 units | 1 ml |
| 90 units | 0.90 ml | 36 units | 1 ml |
| 95 units | 0.95 ml | 38 units | 1 ml |
| 100 units | 1.00 ml | 40 units | 1 ml |
ml to units chart
The reverse direction — useful when a protocol is written in ml or cc (1 cc = 1 ml).
| Volume | U-100 units | U-40 units |
|---|---|---|
| 0.05 ml | 5 units | 2 units |
| 0.1 ml | 10 units | 4 units |
| 0.15 ml | 15 units | 6 units |
| 0.2 ml | 20 units | 8 units |
| 0.25 ml | 25 units | 10 units |
| 0.3 ml | 30 units | 12 units |
| 0.4 ml | 40 units | 16 units |
| 0.5 ml | 50 units | 20 units |
| 0.6 ml | 60 units | 24 units |
| 0.75 ml | 75 units | 30 units |
| 0.8 ml | 80 units | 32 units |
| 1 ml | 100 units | 40 units |
| 1.5 ml | 150 units (> 1 syringe) | 60 units |
| 2 ml | 200 units (> 1 syringe) | 80 units |
| 3 ml | 300 units (> 1 syringe) | 120 units |
| 5 ml | 500 units (> 1 syringe) | 200 units |
| 10 ml | 1000 units (> 1 syringe) | 400 units |
Syringe sizes: 0.3, 0.5 and 1 ml
A 0.3 ml syringe holds 30 units, a 0.5 ml holds 50, a 1 ml holds 100. The scale is identical on all three — a 0.3 ml syringe is not a different unit system, just a shorter barrel with finer lines (often half-unit marks). Pick the smallest syringe that fits the dose: small doses are far easier to read on a 0.3 ml barrel than squeezed into the first few lines of a 1 ml one. Full detail in how to read an insulin syringe.
U-40 vs U-100
U-40 syringes (40 units per ml) are made for veterinary insulin but still turn up in orders and pharmacies. The same liquid volume reads 2.5× fewer units on a U-40 scale: 0.25 ml is 25 units on U-100 and 10 units on U-40. Drawing a U-100 protocol dose on a U-40 syringe delivers 2.5× the intended amount. Check the barrel print before the first draw — the U-40 vs U-100 guide has the full conversion table.
From units to micrograms (and milligrams)
Units measure volume, not peptide. How many mcg a unit carries depends on the reconstitution: mcg per unit = vial mcg ÷ (water ml × 100). A 5 mg vial in 2 ml of water gives 5,000 ÷ 200 = 25 mcg per unit, so 10 units delivers 250 mcg and 40 units delivers 1 mg. The same vial in 1 ml gives 50 mcg per unit — 10 units is now 500 mcg. This is why "take 10 units" means nothing without the mixing details, and why questions like "how many units is 1 mg" have no single answer.
| Vial + water | mcg per unit | 100 mcg = | 1 mg = |
|---|---|---|---|
| 2 mg + 1 ml | 20 mcg | 5 units | 50 units |
| 2 mg + 2 ml | 10 mcg | 10 units | 100 units |
| 5 mg + 1 ml | 50 mcg | 2 units | 20 units |
| 5 mg + 2 ml | 25 mcg | 4 units | 40 units |
| 5 mg + 3 ml | 16.666666666666668 mcg | 6 units | 60 units |
| 10 mg + 1 ml | 100 mcg | 1 units | 10 units |
| 10 mg + 2 ml | 50 mcg | 2 units | 20 units |
| 10 mg + 3 ml | 33.333333333333336 mcg | 3 units | 30 units |
| 20 mg + 2 ml | 100 mcg | 1 units | 10 units |
| 30 mg + 3 ml | 100 mcg | 1 units | 10 units |
The reconstitution calculator does this for any combination, with typical values preloaded for 40+ peptides.
Units vs IU
Syringe units and international units are unrelated. IU measure the biological activity of a specific substance (HCG, HGH, vitamin D) and convert to volume only through that product's concentration. A 5,000 IU HCG vial mixed in 1 ml puts 5,000 IU in 100 syringe units — 50 IU per unit — while the same vial in 2 ml gives 25 IU per unit. Treat IU exactly like mcg in the formula above: total IU ÷ (water ml × 100) = IU per unit.
FAQ
Does 100 units equal 1 ml?+
Yes — on a U-100 insulin syringe, 100 units is exactly 1 ml (1 cc). That is the definition of the U-100 scale: 100 units of insulin per milliliter. So 50 units = 0.5 ml, 10 units = 0.1 ml and 1 unit = 0.01 ml.
How many units are in 1 ml?+
100 units on a U-100 syringe; 40 units on a U-40 syringe. Peptide protocols and human insulin use U-100 unless stated otherwise.
How many units are in 0.5 ml?+
50 units on a U-100 syringe (0.5 × 100). On a U-40 syringe the same 0.5 ml reads 20 units.
How many units are in 3 ml?+
300 units on the U-100 scale — three full 1 ml insulin syringes. A '3 ml insulin pen' holds 300 units of U-100 insulin.
How many units are in 5 ml and 10 ml?+
500 units in 5 ml and 1,000 units in 10 ml (U-100). Volumes that large are never drawn with an insulin syringe; they are vial sizes — a 10 ml vial of bacteriostatic water is 1,000 units' worth.
What is 80 units in ml?+
0.8 ml on a U-100 syringe. 80 units fits only on a 1 ml (100-unit) syringe.
What is 50 units in ml? 30 units? 20 units?+
50 units = 0.5 ml, 30 units = 0.3 ml, 20 units = 0.2 ml, 40 units = 0.4 ml, 60 units = 0.6 ml. Divide units by 100.
How do I convert U-40 to U-100?+
Multiply the U-40 reading by 2.5 to get the U-100 reading for the same volume (10 U-40 units = 0.25 ml = 25 U-100 units). Going the other way, divide by 2.5. The safest route is always through ml: units ÷ 40 or units ÷ 100.
How many units is 1 mg on an insulin syringe?+
It depends entirely on the concentration in the vial — units measure volume, not weight. Divide the vial's total mcg by (water ml × 100) to get mcg per unit, then divide 1,000 mcg by that. Example: a 5 mg vial in 2 ml water gives 25 mcg per unit, so 1 mg = 40 units. In 1 ml of water it is 50 mcg per unit, so 1 mg = 20 units.
How much is 100 mcg on an insulin syringe?+
Again it depends on concentration. 100 mcg = 100 ÷ (mcg per unit). With a 5 mg vial in 2 ml (25 mcg/unit), 100 mcg is 4 units; with a 2 mg vial in 2 ml (10 mcg/unit), it is 10 units. Use the converter above with your vial size and water amount.
What is 1 unit of insulin in ml?+
0.01 ml (one hundredth of a milliliter) on a U-100 syringe. On a U-40 syringe, 1 unit is 0.025 ml.
Are units and IU the same as ml?+
No. 'Units' on a syringe are a volume scale (1/100 ml). 'IU' (international units) measure biological activity of a specific substance — HCG, HGH, vitamin D — and convert to ml only through that product's concentration (e.g. 5,000 IU of HCG in 1 ml means 100 U-100 units = 5,000 IU, 10 units = 500 IU).
What does 2 ml look like in syringe units?+
200 units on the U-100 scale — two full 1 ml insulin syringes. For volumes above 1 ml, use a 3 ml syringe marked in tenths of a ml instead of an insulin syringe.
Is a 0.3 ml syringe a different scale from a 1 ml syringe?+
No. All U-100 syringes share one scale — 100 units per ml. A 0.3 ml syringe holds 30 units and a 0.5 ml holds 50; they are simply shorter barrels with finer markings for small doses. 10 units is 0.1 ml on all three.
How many mls is 100 units of insulin?+
1 ml. A full 1 ml U-100 syringe is 100 units.
Educational reference only — not medical advice. Syringe scales apply to U-100 and U-40 insulin syringes; always confirm the scale printed on the barrel.