Hormone Calculator Suite
Testosterone Dose calculates injection volumes and supply duration. HCG Mixing helps you reconstitute HCG with bacteriostatic water. E2/DHT Predictor estimates estradiol and DHT levels based on your total testosterone. Unit Conversion converts between ng/dL and nmol/L. Free Testosterone calculates free and bioavailable T using the Vermeulen formula.
Hormone Calculator Suite
Precision tools for TRT protocol planning
🎬 Watch: How to Use the Hormone Calculators
How to use: Click on the tabs below to access different calculators. 💊 Testosterone Dose calculates injection volumes and supply duration. 🧪 HCG Mixing helps you reconstitute HCG with bacteriostatic water. 📊 E2/DHT Predictor estimates estradiol and DHT levels based on your total testosterone. 🔄 Unit Conversion converts between ng/dL and nmol/L. 🧬 Free Testosterone calculates free and bioavailable T using the Vermeulen formula.
Testosterone Dosage Calculator
Calculate injection volumes and protocol planning
mg/week
Per Injection
75
mg
Volume Per Injection
0.38
mL
Injections/Week
2
times
Days Per Vial
93
days
Injections Per Vial
26
injections
Injection Volume Based on Syringe Type Total Volume
HCG Mixing Protocol Calculator
Calculate bacteriostatic water for desired HCG concentration
IU
IU
mL
Bac Water to Add
2.5
mL
Final Concentration
2000
IU/mL
Doses Per Ampule
10
doses
Volume Per Dose
0.25
mL
Important: HCG should be refrigerated after reconstitution and used within 60 days.
TRT Hormone Predictor
Predict Estradiol, DHT, and Free Testosterone from Total T
ng/dL
Predicted E2
32
pg/mL
Predicted DHT
48
ng/dL
Predicted Free T
12.5
ng/dL
T:E2 Ratio
18.8
Percent E2 of Total T
5.3
%
T:DHT Ratio
12.5
Free T %
2.1
%
Reference: Lakshman KM et al. J Clin Endocrinol Metab. 2010;95(8):3955-64.
Testosterone Unit Converter
Convert between ng/dL and nmol/L
500
ng/dL
⟷
17.35
nmol/L
ng/dL
500
nmol/L
17.35
ng/mL
5.00
µg/L
5.00
Reference Ranges
| Classification | ng/dL | nmol/L |
|---|---|---|
| Low | <300 | <10.4 |
| Low-Normal | 300-450 | 10.4-15.6 |
| Normal | 450-800 | 15.6-27.7 |
| High-Normal | 800-1000 | 27.7-34.7 |
| Supraphysiological | >1000 | >34.7 |
Free & Bioavailable Testosterone
Vermeulen formula calculation
nmol/L
Calculated Free Testosterone in four different units
Free Testosterone
10.2
ng/dL
Free T
102
pg/mL
Free T
0.354
nmol/L
Free T
354
pmol/L
Bioavailable T
220
ng/dL
Free T %
2.04
%
SHBG-Bound
54
%
Albumin-Bound
44
%
Free T Reference (Adult Males)
| Age | pg/mL | pmol/L |
|---|---|---|
| 20-29 | 9.3-26.5 | 32-92 |
| 30-39 | 8.7-25.1 | 30-87 |
| 40-49 | 6.8-21.5 | 24-75 |
| 50-59 | 7.2-24.0 | 25-83 |
| 60+ | 6.6-18.1 | 23-63 |
Reference: Vermeulen A et al. J Clin Endocrinol Metab. 1999;84(10):3666-72.
Equilibrium dialysis is widely considered the gold standard for measuring free testosterone (FT) due to its high accuracy, especially when low levels are expected. Calculated free testosterone (cFT) is generally suitable for most clinical evaluations, but can overestimate true levels, particularly in cases with abnormal SHBG and albumin levels.
