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Read the reconstitution calculator

What do these fields and answers mean?

Tools › Peptide Reconstitution: pick a mode and unit, open each step in the accordion, and read DRAW PER DOSE, CONCENTRATION and DOSES PER VIAL — each a dash until the values it needs are valid.

AvailabilityFree · Pro only for: From Your Routine prefill

Written for Keel 1.0.0 · build 1Content 2026.09.14 · 2026.09.17-batch2Screens from build 1 (4cbadaa)

Where to start

Tools › Peptide Reconstitution. It is Free.

Two modes

From water added (you know the water that went in) and Plan the water (you know the draw you want).

The accordion

The steps open one at a time: tap a step’s chevron to open it, again to close; entering a value does not close it, and switching mode opens the first incomplete step. A closed step reads back as one line — "Amount in vial · 5 mg", Not entered yet, Needs a number, or Needs a number above zero.

Steps

  1. Choose the mode.
    Reconstitution screen with From water added selected, Measured in mg, the Amount in vial step open with presets, and two collapsed steps beneath reading Not entered yet.
    The calculator’s accordion: pick a mode and unit, then open each step; closed steps read back as one line.
    1. mode
    2. Measured in
    3. presets
    4. collapsed steps
    Where this screen comes from
    File
    G2-F1-calculator-accordion.png (1320×1100); G2-F1-calculator-accordion.webp is a lossy encode of it
    Derivative SHA-256
    1bf60c0711bc6bc77038d0333049a9feeff1c7cde98c600d7ef2327e6dca40cf
    Source
    store-5-reconstitution.png in package Keel-V1-4cbadaa-store-listing-20260908-1619
    Source SHA-256
    66dd2fd0a161e7df974212251a4b177406ab518b3617f8fc39eefb6968156e3d
    Package seal
    bb6bb8cb8f301a369afef5cc37180914f5d7196376f0be585127f6cb51993aa6
    Captured from
    Keel 1.0.0 (1), implementation 4cbadaa1c63a0678b61e703583fadc9af226267d (reused-unchanged)
    Operation
    crop x0 y385 w1320 h1100 (source pixels, origin top-left)

    The numbered markers are drawn by the page, not into the image. Full provenance.

  2. Set Measured in to mg or IU to match the vial label — it relabels Amount in vial and Your dose only; Reconstituted with is always mL and Draw it lands on always syringe units. Switching later relabels; it does not convert typed numbers.
  3. Open Amount in vial and enter the amount on the vial (presets 2, 5, 10, 15, 20, 30, 50 mg or 10, 12, 24, 36, 45, 100 IU are shortcuts for a value you already know).
  4. From water added: enter Reconstituted with in mL (presets 0.5–5). Then Your dose in mcg or IU — never with presets.
  5. Read the results: DRAW PER DOSE with U-100 UNITS, CONCENTRATION and DOSES PER VIAL.
    Result block labelled DRAW PER DOSE with dashes under U-100 units, Concentration and Doses per vial, and the note Calculated from your values.
    With nothing entered, every result is a dash; results fill in as each needed value becomes valid.
    1. empty results
    2. the three outputs
    Where this screen comes from
    File
    G2-F2-results-empty.png (1320×575); G2-F2-results-empty.webp is a lossy encode of it
    Derivative SHA-256
    7c508dbf6b4cb6191e93049057c2ac401234a2c6dae001edc2d9ba47139ad061
    Source
    store-5-reconstitution.png in package Keel-V1-4cbadaa-store-listing-20260908-1619
    Source SHA-256
    66dd2fd0a161e7df974212251a4b177406ab518b3617f8fc39eefb6968156e3d
    Package seal
    bb6bb8cb8f301a369afef5cc37180914f5d7196376f0be585127f6cb51993aa6
    Captured from
    Keel 1.0.0 (1), implementation 4cbadaa1c63a0678b61e703583fadc9af226267d (reused-unchanged)
    Operation
    crop x0 y1520 w1320 h575 (source pixels, origin top-left)

    The numbered markers are drawn by the page, not into the image. Full provenance.

Completed calculator in From water added mode showing three read-back lines and the computed draw, concentration and doses per vial.
Fictional example: three entered values and the answers Keel computes from them — nothing here is a suggested vial, dose, or amount of water.

DisclosureFictional example. The values are the app’s own sample inputs, shown to explain how the fields relate; they are not a preparation or a recommendation.

  1. read-back lines
  2. DRAW PER DOSE
  3. DOSES PER VIAL
Where this screen comes from
File
G2-F3-forward-worksheet.png (1320×1630); G2-F3-forward-worksheet.webp is a lossy encode of it
Derivative SHA-256
ff8b41c16be05442a65e9416fa603406375a95c28006f1b29eb27f3e3f9a2d57
Source
G2-F3-reconstitution-calcdemo-forward.png in package Keel-V1-4cbadaa-guide-figures-20260909-1225
Source SHA-256
a0221edb5596494e4c7de03678743951cb56d0e869040bf7cf435e7ba726627e
Package seal
520b2e67328e635e6c12a1afcac1f5e5a9c18cb5346a953f8972e7f1e2da6b15
Captured from
Keel 1.0.0 (1), implementation 4cbadaa1c63a0678b61e703583fadc9af226267d (reused-unchanged)
Operation
crop x0 y380 w1320 h1630 (source pixels, origin top-left)

The numbered markers are drawn by the page, not into the image. Full provenance.

What changes

A result shows a dash while any value it needs is empty or invalid; the block ends "Calculated from your values." A line beneath spells the arithmetic — vial ÷ water = concentration; dose ÷ concentration = mL = units. The U-100 reading ticks when a valid draw crosses a whole unit.

Where: The result block under the steps

If it looks different

From Your Routine (Pro) opened it with fields filled?
Every field stays editable; see the From Your Routine guide.

Notes

  • Dashes everywhere — reopen each step and look for Not entered yet or Needs a number.
  • Changed Measured in after typing — re-check Amount in vial and Your dose: labels changed, numbers did not.

The calculator reads back the numbers you enter; this guide explains each field and answer and does not suggest a dose, a concentration or an amount of water.