KALKULEROTech & DevPlanning
Project Buffer & PERT Calculator
Estimate realistic project duration and risk contingency buffers using three-point estimation.
Tech, Finance & Marketing
calculated with precision.
Reliable calculation tools built for freelancers, founders, and software engineers. All calculations run client-side directly in your browser with complete privacy.
100% Client-Side & Private
Zero server-side data storage. Your input data never leaves your browser.
Up-to-Date 2026 Benchmarks
Configured with modern API rates, cloud infrastructure pricing, and conversion data.
Instant Real-Time Math
Real-time calculations on every keystroke without paywalls or ad barriers.
8 tools found
Taxes & FinancePerformance
Marketing Budget & ROI Calculator
Analyze Cost per Lead (CPL), CAC, and Return on Ad Spend (ROAS) across campaigns.
Taxes & FinancePricing
Freelancer Hourly Rate Calculator
Calculate your minimum hourly rate taking vacation, sick leave, and provisions into account.
Taxes & FinanceMarketing
Funnel & Lead Calculator
Model your conversion pipeline from traffic to paid customer, CAC, CPL, and overall ROAS.
Tech & DevSEO & SEA
Domain Value Calculator
Estimate domain value based on monthly search volume, CPC auction bids, and TLD authority.
Tech & DevCloud & SaaS
Cloud & Server Cost Calculator
Compare vCPU, RAM, S3 object storage, and egress bandwidth costs between AWS and Hetzner.
Tech & DevGreen Tech
Website Carbon & Speed Calculator
Estimate CO2 emissions per page view and revenue loss resulting from slow load times.
Tech & DevAI & LLM
AI Token & API Cost Calculator
Calculate input/output tokens and estimated monthly bills for GPT-4o, Claude 3.5, and Gemini.
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