It calculates
Mass, volume, U-100 markings and an explicitly selected example calibration are converted mathematically.
Community profiles
Community tool · arithmetic only
From the desired reading to the final solution volume.
The simple default works backwards: enter vial amount, desired amount and reading. Or calculate a theoretical reading from a final solution volume you already know.
Simple syringe and pen calculator
Choose your device and enter your known values. One result appears below.
You know the total solution volume. Calculate the scale mark for your entered amount.
Complete the three number fields to see a result.
The calculator chooses neither a dose nor a mixing liquid. It does not check sterility, stability or suitability for use.
What the units mean
- mg / µg = substance amount. 1 mg = 1,000 µg.
- ml = liquid volume, not substance amount.
- U / clicks = device markings. Their meaning depends on the device scale.
Calculation and extra figures
Complete the three number fields to see a result.
Scale and precision notes
Arithmetic does not establish measurement accuracy. Displayed numbers may be rounded; very small numbers use scientific notation. Intermediate values may not be readable on your device. Do not round fractional clicks up or down.
U-100 is used as a volume scale: 100 U = 1 ml. It is not the substance amount.
Copy this value from your pen's instructions. A 3 ml cartridge does not tell you the volume delivered at 60 clicks.
Source for the U-100 scaleWhat it can—and cannot—do
It cannot verify
Identity, purity, content, sterility, stability, dead space and fluid suitability remain unknown.
It recommends nothing
The desired amount comes only from the visitor. It is neither medically assessed nor confirmed as a dose.