Overview
Buffer Preparation Calculator is an easy and free online tool that runs in your browser.
📐 Buffer design (Henderson–Hasselbalch)
Set a target pH, choose a conjugate pair, and estimate the acid/base split for your buffer.
🥼 Stock solution planner
Convert required moles into volumes from available acid/base stock solutions.
🔍 Buffer check (actual pH)
Verify the pH from measured acid/base masses or moles and adjust as needed.
Buffer Preparation Calculator
Free online Buffer Preparation Calculator. Design chemical buffers using the Henderson–Hasselbalch equation. Estimate component masses. Works offline.
science
How people use it
This browser-based tool is designed to be fast, easy to use, and private by default. Open the tool, adjust the settings, and get results instantly without creating an account or sending files to a server.
Everything runs locally in the browser whenever possible, which reduces friction for users and makes the page more useful as a direct-answer landing page from search.
Common topics
The following topics are closely related to this tool and help explain what it is for:
- buffer
- chemistry
- henderson hasselbalch
- lab
- calculator
- online
- free
Quick answers
What does the buffer designer calculate?
It uses the Henderson–Hasselbalch equation to split total concentration into acid/base amounts for a target pH and pKa.
What are the required inputs?
Target pH, pKa, total buffer concentration, and final volume. Molar masses are optional but enable mass (g) estimates.
What does the stock solution planner do?
It converts required moles into volumes from your acid/base stock concentrations and estimates how much water to add.