| What it does | Electronics calculators for makers
| Free UK money calculators for tax, mortgages, loans, savings and everyday maths
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| Founded | Not given
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| Based in | Not given
| GB
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| Pricing model | Freemium
| Free
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| Pricing | Free: $0 forever. Pro Monthly: $4 per month, cancel anytime. Pro Lifetime: $29 one-time payment.
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| Key features | - Resistor Color Code: read 4, 5 and 6-band resistors or find bands for a value
- LED Resistor: pick the current-limiting resistor and power rating
- Voltage Divider: output voltage, loading effect, or solve R2 for target Vout
- RC Filter: cutoff frequency, time constant and attenuation at any frequency
- LC Resonance: resonant frequency, characteristic impedance and Q
- 555 Timer: astable frequency/duty cycle and monostable pulse width
- Battery Life: runtime from capacity, active/sleep current and duty cycle
- PCB Trace Width: IPC-2221 trace width for current and temperature rise
- Electronics Unit Converter: SI prefixes, AWG to mm², mil to mm, dBm to mW, oz copper
| - Take-home pay calculator for income tax and National Insurance
- Salary to hourly wage converter
- Student loan repayment calculator for Plans 1, 2, 4, 5 and postgraduate
- Mortgage repayment calculator
- Stamp Duty Land Tax calculator for England and Northern Ireland
- Compound interest and savings goal projections
- Debt payoff and credit card repayment planner
- VAT calculator
- Monthly budget builder
- Currency converter
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| What makes it different | - Real E-series resistor values, not ideal numbers
- Engineering notation input and result sharing as links
- No ads, no tracking, no sign-up for free calculators
- Whole-device BOM costing and battery-life summary in Pro
- Works on phone at the bench
| - No signup required to use any calculator
- All calculators use official UK tax rates with documented update dates
- Consistent structure with worked examples and FAQ for every tool
- Designed for search accuracy and transparency
- Clear disclaimers and not personalised financial advice
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| Community votes | 0 | 0 |
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| DR (Domain Rating by Ahrefs) | 1 ▲ +1 (up) since last check | 2 ▲ +2 (up) since last check |
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| Trust Flow (Majestic) | 0 | 0 |
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| Citation Flow (Majestic) | 0 | 0 |
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| Referring domains (Majestic) | 0 | 0 |
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Ohmlark
Handy Money Tools