Observed arrival · 2026-10-09
Freelance Calculation Lab’s 37 browser tools
A Japanese-language collection of free calculators for freelancers, covering platform fees, taxes, invoicing, pricing, and deadlines.
○Open
⊠Login
$Paid
†Ads
✦Pretty
●Pro
◎Niche
◉Human
⚑Risk
ƒJS
- For
- Japanese freelancers and sole proprietors
- Worth noticing
- The listed tools include a tax-deadline calendar that exports selected dates as an .ics file.
Field notes
The homepage groups the tools into six task areas, from pricing and taxes to communication and work management. Listed examples include a cash-flow view that projects 12 months of balances from expected payments and fixed expenses, and a calendar that saves selected tax dates as an .ics file. The site says calculations run in the browser and entered figures are not sent off the device.
Observed signals
Read the marks
Editorial observations of this landing page, not a rating.
○OpenPublic substance visible
●ProPolished or operationally mature
◎NicheUnusually specific use
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