CHAMBER 01 / LIVEHF RADIO
Skywave
A daily ham radio puzzle. Read the sun, pick the band and bounce your signal off the ionosphere to reach ten stations before the day runs out.
Play Skywave FACILITY 01 / ONLINEEST. 2026
Deus ExMachinaLabs
God from the lab.
Small free games and tools that run in your browser. I build them in my home lab, one at a time, and put them here when they work.
CHAMBER INDEXREV 1.0
Work in progressThings here change. If something breaks, tell me.
SECTION 02 / TEST CHAMBERS
Games
PLAYS IN THE BROWSER / FREE
CHAMBER 02 - IN DEVELOPMENT
Chamber 02
In development. Nothing to see yet.
CHAMBER 03 - IN DEVELOPMENT
Chamber 03
In development. Nothing to see yet.
SECTION 03 / INSTRUMENTS
Tools
Free UK money calculators. Estimates, not advice.
TOOL 01 / LIVECIS
CIS tax refund estimator
For subcontractors. Estimate your CIS refund or tax bill for 2025/26 or 2026/27, and see which Self Assessment boxes the figures go in.
Open toolTOOL 02 / LIVECIS
CIS deduction calculator
For contractors and subcontractors. Check what should come off an invoice at 20%, 30% or gross: labour only, with materials and VAT left out.
Open toolTOOL 03 / LIVEPROBATE
Probate and Inheritance Tax calculator
For England and Wales. Estimate the Inheritance Tax on an estate, with the residence allowance, gifts and the probate fee.
Open toolTOOL 04 / LIVELATE PAYMENT
Late payment interest calculator
For businesses chasing a late invoice. Work out the statutory interest at 8% plus base rate, and the £40, £70 or £100 compensation.
Open toolTOOL 05 / LIVEINHERITANCE TAX
Gift Inheritance Tax taper checker
For anyone who has given money away. See how far a gift is through the 7 years, its taper rate, and the day it drops out of Inheritance Tax.
Open toolTOOL 06 / LIVEVAT
VAT threshold checker
For sole traders and small firms. Enter 12 months of sales and see your rolling total against £90,000, your headroom and any deadline to register.
Open toolSECTION 04 / SUPPLY ROOM
Support the lab
LINKS OPEN OTHER SITES