SPC · tools and guides

Peptide calculator & SPC help

Answers about concentration, U-100 units, saved calculations, schedules, privacy and optional Pro.

What does a peptide calculator calculate?

SPC calculates concentration, required volume, U-100 markings and complete doses per vial from values you enter. It does not recommend a dose.

How is concentration calculated?

Vial mass divided by liquid volume: mg ÷ mL = mg/mL. Try the concentration tool.

What does changing diluent change?

It changes concentration and the volume required for an entered mass, not the total vial mass. See the math guide.

How are U-100 units calculated?

Multiply mL by 100. This applies only to the U-100 scale. Convert units and mL.

What is the difference between mg and mcg?

One mg is 1,000 mcg. Neither is a liquid-volume unit. Convert mg and mcg.

Why does SPC reject some results?

The entered dose must fit within the vial, and its calculated volume must fit the selected syringe. Values must be finite and positive. SPC does not clamp an impossible result into a normal-looking syringe.

Can I save calculations, schedules and history?

SPC Pro supports a Library, user-defined schedules, Today, recorded History and account sync. The calculator itself is free without an account. See Pro features and pricing.

Can vial information change during a cycle?

Preparation history is date-based where supported by your client. Recorded history should retain its original preparation snapshot. Use the preparation-change control only when offered by your current version; do not overwrite history to simulate a change. Ask support about your client version.

What happens when Pro expires?

Supported saved data remains available read-only. Editing and Pro actions require an eligible entitlement. Keep a backup through Settings → Backup & Export.

Are reminders guaranteed?

No. Browser/device support, permission, connectivity and operating-system settings affect notifications. SPC is not a safety-critical reminder service.

Where is my data?

SPC uses local storage for app data and supported account sync for signed-in users. Another browser profile has its own local storage. See Privacy and export backups before destructive device changes.

How do I update the installed app?

Refresh or reopen normally. If you need help, use SPC update recovery. Do not clear storage or reinstall as a routine update step.

Does SPC provide medical advice?

No. SPC is a calculation and recordkeeping utility. It does not prescribe substances, doses, schedules or treatments.