Tirzepatide Cost Calculator: Compounded vs Brand
Calculate your monthly and annual tirzepatide cost. Compare compounded providers BiltRx and Arc-1 against brand-name Zepbound and Mounjaro pricing.
Use the calculator below to compare what you will pay for compounded tirzepatide versus brand-name Mounjaro or Zepbound. Enter the price, milligrams per unit, and number of units in your order. The tool calculates cost per milligram so you can compare products on equal footing regardless of packaging.
Calculate Your Tirzepatide Cost
How the Calculator Works
The calculator performs three simple operations. It multiplies milligrams per unit by the number of units to get total milligrams in the order. It divides the price by total milligrams to get cost per milligram. It divides the price by number of units to get cost per unit. No data leaves your browser.
Compounded Tirzepatide Inputs
For BiltRx, enter $129 as the price and the milligrams your provider prescribes as the per-unit amount. Since BiltRx ships monthly, set units to 1. For Arc-1, enter the price for your dose tier ($199.99 for 2.5 mg, $249.99 for 5 mg, or $399.99 for 7.5 mg) and the corresponding milligram amount. Arc-1 formulations also contain Glycine and B12, but the calculator measures cost against the tirzepatide dose only.
Brand-Name Tirzepatide Inputs
Mounjaro and Zepbound are available in multiple dose strengths from 2.5 mg to 15 mg per injection. Each box contains 4 pre-filled pens (one month of weekly injections). Enter the box price, the dose per pen, and 4 as the unit count. At $1,499 per month through BiltRx, a box of 4 pens at 5 mg each contains 20 mg total, which works out to $74.95 per milligram. That number makes the cost difference concrete.
Price Data We Use
The table below shows the pricing inputs we reference for each provider and product. All figures are from provider websites as of October 2026.
| Provider | Product | Monthly Price | Source |
|---|---|---|---|
| BiltRx | Compounded tirzepatide | $129 | BiltRx website |
| Arc-1 | Compounded tirzepatide + Glycine + B12 (2.5 mg) | $199.99 | Arc-1 website |
| Arc-1 | Compounded tirzepatide + Glycine + B12 (5 mg) | $249.99 | Arc-1 website |
| Arc-1 | Compounded tirzepatide + Glycine + B12 (7.5 mg) | $399.99 | Arc-1 website |
| BiltRx | Mounjaro (brand) | $1,499 | BiltRx website |
| BiltRx | Zepbound (brand) | $1,499 | BiltRx website |
FAQ
Why does cost per milligram matter?
Monthly prices are misleading when products contain different amounts of medication. A $129 monthly subscription and a $199.99 monthly subscription might deliver the same milligrams at different concentrations. Cost per milligram normalizes the comparison so you see the actual value regardless of how the product is packaged or priced.
Does the calculator include shipping costs?
No. Arc-1 includes free shipping. BiltRx shipping costs vary. If your provider charges for shipping, add that amount to the price field before calculating to get a more accurate per-milligram figure.
Can I compare compounded tirzepatide to my insurance copay?
Yes. Enter your insurance copay as the price and the dose and pen count from your prescription. The calculator will show your cost per milligram under insurance, which you can then compare against compounded pricing. Some patients with good commercial coverage pay less per milligram through insurance than through compounded providers.
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