Alligation Pharmacy Calculator

Mixing two drug strengths? Don’t sweat it. Our Alligation Pharmacy Calculator makes it super easy to get the right mix every time. Whether you're in school, at the counter, or working in a lab, this tool saves time and stress.

What’s Alligation, Anyway?

Alligation is a quick method to mix two different concentrations and get the strength you want.

Let’s say you have a 20% solution and a 5% one. But your patient needs 10%. What now? That’s where alligation comes in. It tells you how much of each to mix.

You don’t need to be a math whiz. You just need the formula — and we’ve built it right into our calculator.

Why This Calculator Is a Game-Changer

This tool is simple. You plug in:

• The high concentration
• The low concentration
• The target concentration
• (Optional) The final volume or weight

Then, click "Calculate." Done. It shows you the exact amount of each solution to use.

Need to mix creams or liquids? No problem. The calculator works for both.

Real-Life Example: Mixing Two Solutions

Let’s walk through it.

You have:

• 20% solution
• 5% solution
• You want 10%
• Total volume: 300 mL

Here's how the math works:

• Parts of high = 10 – 5 = 5
• Parts of low = 20 – 10 = 10
• That gives a 1:2 ratio

Now apply that ratio:

• High: (1/3) × 300 = 100 mL
• Low: (2/3) × 300 = 200 mL

Mix 100 mL of 20% with 200 mL of 5%. Boom — you’ve got 300 mL of 10%.

How the Formula Works

The alligation method follows a simple rule:

Parts of High = Desired – Low  

Parts of Low = High – Desired

Then:

Total Parts = Parts High + Parts Low  

Volume of High = (Parts High / Total) × Final Volume  

Volume of Low = (Parts Low / Total) × Final Volume

That’s it. Just a few steps, and you’ve nailed the mix.

How to Use the Calculator

Here’s how you can use it right now:

1. Enter your high, low, and desired concentrations.
2. Add the total volume if needed.
3. Choose whether you want just the ratio or actual amounts.
4. Hit “Calculate.”

The result will show:

• The simplified ratio
• How many mL (or grams) of each part
• The percentage of each in the mix
• A final check to make sure it's accurate

Why Pharmacists Love This Tool

Pharmacy math can get tricky. This tool keeps it simple. No paper. No complex steps. Just fast, correct answers.

It’s great for:

• Students learning the ropes
• Pharmacists in a rush
• Nurses or doctors double-checking mixes
• Compounding labs working with creams or liquids

Final Word

Mixing drugs should be safe, fast, and stress-free. That’s why we built this calculator—to help you get it right every time. Whether you're prepping for exams or working in real life, you’ll love how easy it is to use.

Try it once, and you’ll wonder how you did without it.

FAQs

What is alligation in pharmacy?

It’s a way to mix two concentrations to get a new one. It’s fast and accurate.

Can I use this for ointments?

Yes! Just treat the grams like mL. The math is the same.

What if I don’t have a final volume?

No worries. The tool can show just the ratio. You decide how much to mix.

Is this calculator free?

Yes. 100% free to use. No sign-up needed.

Is the result verified?

Yes. It even shows the final mixed concentration to double-check your work.