Electricity Energy Cost Calculator
Calculate electricity energy cost with labeled inputs, explicit units and the formula cost = kW × hours × price/kWh.
ElectricalOpen tool ↗THE FEUTEX TOOLKIT
Tools for everyday tasks · Page 5
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1444 tools
Gross Profit Margin Calculator
Calculate gross profit margin with labeled inputs, explicit units and the formula margin = 100(revenue−COGS)/revenue.
BusinessOpen tool ↗Cost Markup Calculator
Calculate cost markup with labeled inputs, explicit units and the formula markup = 100(price−cost)/cost.
BusinessOpen tool ↗Break-Even Units Calculator
Calculate break-even units with labeled inputs, explicit units and the formula units = ceil(fixed costs / (price−variable cost)).
BusinessOpen tool ↗Unit Contribution Margin Calculator
Calculate unit contribution margin with labeled inputs, explicit units and the formula contribution = price−variable cost.
BusinessOpen tool ↗Customer Acquisition Cost Calculator
Calculate customer acquisition cost with labeled inputs, explicit units and the formula CAC = acquisition spend / new customers.
BusinessOpen tool ↗Return on Ad Spend Calculator
Calculate return on ad spend with labeled inputs, explicit units and the formula ROAS = attributed revenue / ad spend.
BusinessOpen tool ↗Conversion Rate Calculator
Calculate conversion rate with labeled inputs, explicit units and the formula rate = 100 conversions / eligible visits.
BusinessOpen tool ↗Average Order Value Calculator
Calculate average order value with labeled inputs, explicit units and the formula AOV = order revenue / order count.
BusinessOpen tool ↗Inventory Turnover Calculator
Calculate inventory turnover with labeled inputs, explicit units and the formula turnover = period COGS / average inventory.
BusinessOpen tool ↗Days Sales Outstanding Calculator
Calculate days sales outstanding with labeled inputs, explicit units and the formula DSO = average receivables / credit sales × period
BusinessOpen tool ↗Customer Churn Rate Calculator
Calculate customer churn rate with labeled inputs, explicit units and the formula churn = 100 lost customers / starting customers.
BusinessOpen tool ↗Net Revenue Retention Calculator
Calculate net revenue retention with labeled inputs, explicit units and the formula NRR = 100(start+expansion−contraction−churn)/start.
BusinessOpen tool ↗Capacity Utilization Calculator
Calculate capacity utilization with labeled inputs, explicit units and the formula utilization = 100 actual output / capacity.
BusinessOpen tool ↗Labor Productivity Calculator
Calculate labor productivity with labeled inputs, explicit units and the formula productivity = output / labor hours.
BusinessOpen tool ↗Inventory Reorder Point Calculator
Calculate inventory reorder point with labeled inputs, explicit units and the formula reorder point = daily demand × lead time + safety
BusinessOpen tool ↗Concrete Slab Quantity Calculator
Calculate concrete slab quantity with labeled inputs, explicit units and the formula quantity = length × width × depth × (1+waste/100).
ConstructionOpen tool ↗Paint Quantity Calculator
Calculate paint quantity with labeled inputs, explicit units and the formula liters = area × coats / coverage × (1+waste/100).
ConstructionOpen tool ↗Floor Tile Count Calculator
Calculate floor tile count with labeled inputs, explicit units and the formula tiles = ceil(area / tile area × (1+waste/100)).
ConstructionOpen tool ↗Gravel Mass Calculator
Calculate gravel mass with labeled inputs, explicit units and the formula mass = area × depth × bulk density.
ConstructionOpen tool ↗Wallpaper Roll Count Calculator
Calculate wallpaper roll count with labeled inputs, explicit units and the formula rolls = ceil(ceil(wall width / roll width) / floor(r
ConstructionOpen tool ↗Roof Pitch Angle Calculator
Calculate roof pitch angle with labeled inputs, explicit units and the formula angle = atan(rise/run).
ConstructionOpen tool ↗Stair Riser Count Calculator
Calculate stair riser count with labeled inputs, explicit units and the formula count = ceil(total rise / target maximum riser).
ConstructionOpen tool ↗Straight Fence Post Count Calculator
Calculate straight fence post count with labeled inputs, explicit units and the formula posts = ceil(length / maximum spacing) + 1.
ConstructionOpen tool ↗Paver Bedding Sand Volume Calculator
Calculate paver bedding sand volume with labeled inputs, explicit units and the formula loose volume = area × depth/1000 × volume facto
ConstructionOpen tool ↗Brick Wall Count Calculator
Calculate brick wall count with labeled inputs, explicit units and the formula bricks = ceil(area × 10⁶ / [(length+joint)(height+joint)
ConstructionOpen tool ↗Reading Time Calculator
Calculate reading time with labeled inputs, explicit units and the formula time = words / reading speed.
ProductivityOpen tool ↗Speech Duration Calculator
Calculate speech duration with labeled inputs, explicit units and the formula duration = words / speaking rate + pauses/60.
ProductivityOpen tool ↗Pomodoro Session Duration Calculator
Calculate pomodoro session duration with labeled inputs, explicit units and the formula duration = sessions × work + (sessions−1) × bre
ProductivityOpen tool ↗Ideal Download Time Calculator
Calculate ideal download time with labeled inputs, explicit units and the formula seconds = MB × 8 / Mbps.
ProductivityOpen tool ↗Meeting Person-Hours Calculator
Calculate meeting person-hours with labeled inputs, explicit units and the formula person-hours = attendees × minutes/60.
ProductivityOpen tool ↗Task Completion Time Calculator
Calculate task completion time with labeled inputs, explicit units and the formula time = tasks / completion rate.
ProductivityOpen tool ↗Availability from Downtime Calculator
Calculate availability from downtime with labeled inputs, explicit units and the formula availability = 100(period−downtime)/period.
ProductivityOpen tool ↗Allowed Downtime Budget Calculator
Calculate allowed downtime budget with labeled inputs, explicit units and the formula budget = period × (1−availability/100).
ProductivityOpen tool ↗Little’s Law Work in Progress Calculator
Calculate little’s law work in progress with labeled inputs, explicit units and the formula WIP = throughput × flow time.
ProductivityOpen tool ↗Amdahl Parallel Speedup Calculator
Calculate amdahl parallel speedup with labeled inputs, explicit units and the formula speedup = 1 / [(1−p)+p/n].
ProductivityOpen tool ↗Recipe Scaler
Scale an entire ingredient list to a new serving count, preserving ingredient names and units.
CookingOpen tool ↗Baker’s Percentage Planner
Calculate dough ingredients and total dough mass from flour weight and baker percentages.
CookingOpen tool ↗Cake Pan Recipe Adjuster
Find the ingredient scaling factor when changing between round or rectangular baking pans.
CookingOpen tool ↗Coffee Brew Planner
Plan coffee and water quantities for a chosen brew ratio and batch size.
CookingOpen tool ↗Mixture Strength Planner
Combine two solutions of known strength and calculate the resulting proportion.
CookingOpen tool ↗Unit Price Comparison
Compare two package prices after accounting for pack quantity and item size.
ShoppingOpen tool ↗Stacked Discount Calculator
Apply successive discounts in the correct order and see the equivalent total saving.
ShoppingOpen tool ↗Bill and Tip Splitter
Split a bill, fixed service charges and a percentage tip across a group.
ShoppingOpen tool ↗Gift Budget Planner
Allocate a fixed gift budget across recipients using weighted priorities.
ShoppingOpen tool ↗Road Trip Fuel Cost
Estimate fuel and total trip costs from distance, consumption, fuel price and tolls.
TravelOpen tool ↗Travel Budget Planner
Build a trip budget with per-person lodging, food, transport and a contingency allowance.
TravelOpen tool ↗Trip Packing Checklist
Create an editable checklist based on trip length, laundry frequency and planned activities.
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