Sharp Logica
Tools & Calculators
Practical calculators and estimators for engineering, finance, and technology decisions.
31
Calculators
3
Categories
Free, no account required
Runs entirely in your browser
Category
Business Tools
Tools for commercial planning and team economics.
- Due Diligence Risk Score Calculator
Run a preliminary technology risk assessment across architecture, security, technical debt, operations, cloud, team risk, and delivery health.
- Unit Conversion Calculator
Convert common units quickly across time, length, weight, temperature, and currency.
- Break-Even Calculator
Calculate break-even point from fixed costs, variable costs, and unit price to understand when a product becomes profitable.
- Profit Margin Calculator
Calculate gross margin, net margin, and markup from cost and selling price to validate profitability targets.
- ROI Calculator
Estimate return on investment by comparing project gains against total investment cost over time.
- CAC Payback Calculator
Estimate how many months it takes to recover customer acquisition cost using gross margin and recurring revenue.
- LTV Calculator
Estimate customer lifetime value from average revenue, gross margin, and retention assumptions.
- Business Name Generator
Generate business name ideas from brand direction, keywords, and naming style preferences.
- User Name Generator
Generate user name ideas from keywords, style preferences, and platform constraints.
- Password Generator
Generate strong password suggestions based on length and character-set preferences.
- Invoice Number Generator
Generate structured invoice numbers with prefixes, dates, and sequence patterns.
- Age Calculator
Calculate exact age from date of birth and compare date spans in years, months, and days.
- Working Days Calculator
Calculate working days between dates with weekday and holiday exclusions.
- Meeting Time Zone Calculator
Convert meeting times across time zones to find overlap windows for distributed teams.
- Contractor Rate Calculator
Estimate fair contractor rates from annual income goals, utilization, expenses, and taxes.
- Pricing Calculator
Estimate product or service pricing using margin targets, cost inputs, and revenue assumptions.
Category
Finance Tools
Calculators for money, planning, and operating costs.
- Burn Rate Calculator
Calculate your startup's monthly burn rate and cash runway. Enter cash on hand, monthly revenue, and expenses to see how long your capital lasts.
- Loan Calculator
Calculate monthly loan payments, total repayment, and total interest for any fixed-rate loan. Works for personal loans, car loans, and business loans.
- Markup vs Margin Calculator
Compare markup and margin from cost and selling price to avoid pricing mistakes.
- Mortgage Calculator
Calculate your monthly mortgage payment instantly. Enter home price, down payment, interest rate, and loan term to see total cost, total interest, and payoff date.
- Percentage Calculator
Quickly calculate percentages, percentage change, and percentage increase or decrease.
- Rule of 72 Calculator
Estimate how long it takes for an investment to double using the Rule of 72.
- Salary Calculator
Convert salary across hourly, daily, monthly, and yearly views with optional deductions.
- Tax Estimator
Estimate tax liability using income, filing assumptions, and deduction inputs.
- Tip Calculator
Estimate tip amount, total bill, and per-person split based on service percentage and party size.
- VAT Calculator
Calculate VAT-inclusive price, VAT-exclusive price, and VAT amount from entered values and tax rates.
- Fuel Cost Calculator
Estimate trip fuel cost using distance, fuel efficiency, and current fuel price.
Category
Engineering Tools
Calculators and scorecards for architecture, delivery, and technical strategy.
- AI ROI Calculator
Model potential return on investment from AI initiatives by comparing implementation cost to measurable gains.
- Architecture Scorecard
Score your software architecture across maintainability, scalability, reliability, and delivery risk.
- Team Capacity Calculator
Estimate effective engineering capacity based on team size, availability, and non-project overhead.
- Technical Debt Calculator
Estimate the cost, risk, and delivery impact of unresolved technical debt in your product or platform.