The quick way to figure things out.
Flux Media Systems is a small independent digital publishing company focused on one thing: free, accurate utility tools for everyday financial, legal, health, and pet care decisions. We are not a media conglomerate or a lead-generation business. We don't sell your data, accept sponsored placements, or push affiliate products. We build tools, keep them accurate, and make them free to use.
The company was founded with a single editorial principle: every tool published must be sourced from official or peer-reviewed data, must disclose its methodology, and must tell users clearly what it can and cannot do.
The tools and guides here are researched and written by Iulian, the founder of Flux Media Systems. I'm not a lawyer, accountant, doctor, or vet — and I don't pretend to be. What I do is read the official source material carefully (HMRC, gov.uk, the NHS, the ADA, the American Animal Hospital Association and similar bodies), turn it into a tool that gives you a clear number, and show my working so you can check it. Every calculator states the data it uses and the year it applies to.
Because of that, everything on this site is general information, not professional advice. For decisions that carry real financial, legal, or health consequences, please confirm the result with a qualified professional. If you ever spot a figure that looks wrong or out of date, the contact page goes straight to me and I fix errors quickly.
Flux Media Systems is built around a single idea: the information you need to make a good decision should be free, fast, and honest.
Too often, the useful answer is buried behind a paywall, padded out into a 4,000-word article designed to rank rather than inform, or scattered across a forum thread from 2017. This site exists to cut through that — to give you the actual number, the clear explanation, or the relevant comparison in under two minutes.
Free calculators and plain-English guides across six areas:
All tools are free to use, no sign-up required.
Most tools cover both the UK and US, reflecting the two audiences this site is designed for. Where figures differ by jurisdiction — stamp duty vs property tax, National Insurance vs FICA, the State Pension vs Social Security — both are covered.
UK figures are updated to the current tax year (2025/26 at time of writing). US figures use the current federal tax brackets. Where rates are set to change, those changes are noted in the relevant calculator.
Calculators use official published figures wherever possible: HMRC, the DWP, the Child Maintenance Service, the Pensions Regulator, the IRS, and the Social Security Administration. Veterinary dosing figures are referenced to Plumb's Veterinary Drug Handbook and the BSAVA Small Animal Formulary. Specific sources are noted on the relevant tool pages.
Results are estimates. Legal and financial situations are personal and complicated. Always verify anything important with a qualified professional — a solicitor, a financial adviser, an accountant, or your vet. The calculators are a starting point for understanding, not a substitute for advice.
The site carries display advertising via Google AdSense — that's how it funds the running costs. There are no affiliate links, no sponsored recommendations, no products being pushed. The calculator results are not influenced by any third party.
Tax thresholds, benefit rates, and legal limits change regularly — sometimes annually, sometimes mid-year. The redundancy weekly pay cap, for example, is reviewed each April by the government. Stamp duty thresholds in England changed in April 2025. The State Pension triple lock adjusts every year. Keeping calculators accurate requires monitoring these changes and updating figures as they take effect.
Where a rate is known to be changing on a future date, the calculator notes this so you can see both the current and upcoming figures. Where there's genuine uncertainty — for example, when a government consultation is ongoing — that uncertainty is flagged rather than papered over with a confident-looking number.
A calculator can tell you the statutory redundancy pay formula and apply it to your numbers — it cannot tell you whether your redundancy was genuine, whether your employer followed the correct process, or whether you have grounds to challenge it. A stamp duty calculator can apply the published rates — it cannot account for whether a particular property qualifies for mixed-use treatment, or how a complex chain of transactions should be structured for tax purposes.
These are real questions that require professional advice. The tools here are designed to get you to the right ballpark quickly — so that when you do consult a solicitor, an accountant, or a financial adviser, you arrive informed rather than starting from zero.
If a figure looks wrong, a link is broken, or there's something you'd like to see built — please get in touch. Rates change, and corrections are genuinely appreciated.