Tox conversion calculator
Use this practitioner tool when you need a quick toxin-unit to Speywood-unit comparison, plus a fast toxin-unit dilution reference in the same place. Anti-wrinkle injections and Bocouture are measured in toxin units. Azzalure is measured in Speywood units, so each side of the calculator is labelled clearly.
Two-way conversion
Move between toxin units and Speywood units without guessing which scale you are looking at.
Quick dilution check
Check toxin units per 0.1 ml and 0.05 ml from the vial and final volume you select.
Use with care
Keep it as a quick reference and always check the product information for the unit scale you are using.
Use it when you want a fast number check before you go back to your own product information, treatment plan, or training notes.
Toxin-unit side
Use this side for anti-wrinkle injections and Bocouture, which are measured in toxin units.
Speywood-unit side
Use this side for Azzalure, which is measured in Speywood units.
Use the calculator
Check the unit comparison quickly.
If you need a fast reference point while reviewing your notes, preparing for training, or checking numbers in clinic, use the calculator here. If you also want a quick units-per-volume check for toxin-unit products, the dilution reference sits just below.
Calculator
Toxin-unit to Speywood-unit comparison
Enter units on either side and the matching value will update automatically.
Left side
Toxin units
Enter the toxin units you want to convert from anti-wrinkle injections or Bocouture.
Quick toxin-unit presets
Conversion ratio
1 toxin unit
=
2.5 Speywood units
Type into either side and the matching value updates automatically.
Right side
Speywood units
Enter the Speywood units you want to convert from Azzalure.
Unit note
This side is here to stop learners mixing Azzalure Speywood units with toxin-unit products.
Clinical caution
Use this as a quick reference only. Product labels treat botulinum toxin units as product-specific, so always check the relevant SmPC, your supervision arrangements, and your patient-specific plan before treatment.
Dilution quick reference
Check the units-per-volume view from standard toxin-unit vial sizes and final volumes.
Use this section for toxin-unit products only. Select the product first, then select the labelled toxin units in the vial and the total final volume you are working with. The calculator will then show a quick reference for toxin units per 0.1 ml, toxin units per 0.05 ml, and the approximate volume for 1 toxin unit or 4 toxin units.
Dilution calculator
Tox dilution quick reference
Select the toxin-unit product, vial size, and final volume you are working with. Azzalure is measured in Speywood units and is covered by the converter above.
Common toxin-unit vial presets
Anti-wrinkle injectable products on this side are measured in toxin units and commonly use 50, 100, or 200 unit vial references.
Common final volume presets
Standard quick-reference volumes: 1 ml, 1.25 ml, 2 ml, and 2.5 ml.
toxin units per 0.1 ml
4
toxin units per 0.05 ml
2
ml for 1 toxin unit
0.025
ml for 4 toxin units
0.1
Practical note
This section only turns the numbers you enter into a quick toxin-unit-per-volume reference. It does not recommend a preparation method or treatment plan.
Toxin-unit products
Keep the unit system clear.
Anti-wrinkle injectable products commonly use 50, 100, and 200 toxin-unit vial references. Bocouture comes in 50 or 100 toxin units. This section keeps the calculations in toxin units so learners do not mix toxin units with Speywood units.
Standard mix volumes
Stay within the common setup options.
This quick reference uses the standard final volumes your team works with: 1 ml, 1.25 ml, 2 ml, and 2.5 ml.
Check the source
Keep the reference close to the official product information.
If you want to double-check the source information behind your numbers, use the official references below.
Training next steps
If you need more confidence with injectables, go to training next.
A quick calculator can help with the numbers. If you still need more confidence with anti-wrinkle treatments or injectable progression, the next step is proper training and guidance.
Level 7 injectable training
If you want to build advanced injectable knowledge and a stronger qualification base, explore the full Level 7 pathway.
View Level 7 training
Foundation anti-wrinkle training
If you are still building confidence with anti-wrinkle treatments, start with practical training before relying on quick-reference tools.
View foundation training
Online anti-wrinkle theory
If you want to refresh the theory before your next practical step, use the online foundation course as a flexible study option.
View online theoryNeed help choosing the right injectable training?
Speak with admissions before you book.
If you are comparing anti-wrinkle training, online theory, or Level 7 progression, use an advisor call to work out the right next step for your background and training goals.
Quick answers
What to keep in mind when you use the calculator.
Who is this calculator for?
This tool is for qualified practitioners, injectable trainees, and clinic teams who need a fast unit comparison reference. It is not intended for consumer use.
Does this replace product information or prescribing guidance?
No. Product labels treat units as product-specific. Use this tool as a quick reference, then confirm the relevant product information, your clinical protocol, and your patient-specific plan before treatment.
Which products does this comparison focus on?
This page focuses on toxin-unit products such as anti-wrinkle injections and Bocouture, against Azzalure, which is measured in Speywood units.
What does the dilution calculator do?
It shows a quick toxin-unit per volume reference based on the standard toxin-unit vial sizes and final volumes shown on the page. It is there to help with the maths, not to replace product-specific treatment guidance.
What if I need training before offering anti-wrinkle treatments?
If you still need training, the better next step is to speak with admissions or view the relevant anti-wrinkle and Level 7 training routes instead of relying on a calculator alone.