Scratch calculator for Mac

A notepad that does the math.

One calculation per line, with units if you need them. Answers appear on the right as you type.

1.0.3 · macOS 14 or later · Apple silicon and Intel

# Carry-on weight

1.6 kg # laptop1.6 kg

850 g # camera850 g

2 lb # shoes2 lb

3.2 kg # clothes3.2 kg

# Scale a recipe

SCALE = 6 / 41.5

FLOUR = 350 g × SCALE525 g

BUTTER = 80 g × SCALE120 g

MILK = 1 cup × SCALE in mL354.88 mL

375 F in C190.56 °C

# Split the bill

BILL = $148.60$148.60

TIP = 18% of BILL$26.75

TOTAL = BILL + TIP$175.35

TOTAL / 4$43.84

# Upload footage

FOOTAGE = 2 h2 h

SIZE = FOOTAGE × 50 Mbit/s in GB45 GB

UPLOAD = 40 Mbit/s5 MB/s

SIZE / UPLOAD in h2.5 h

Units built in.

Length, weight, volume, temperature, speed, data, energy, money and more. Convert with 375 F in C.

Name a value and use it further down. Change it, and every line that uses it updates.

Each scratch is a .txt file in your Documents folder. No account, no network access.

TotalsSum, mean, median or standard deviation of the whole sheet.
CopyingClick a result to copy it, or copy the whole sheet as text.
DisplaySet the precision, switch to hex or octal, or right-click a result or the total to change its unit.
Naming⌘N starts a scratch and ⌘W deletes one. Its first line becomes its name.

Open the disk image and drag Anticalc to Applications.

macOS 14 or later