To calculate net accounts receivable, you need: total accounts receivable, allowance for doubtful accounts, and sales returns and allowances. A company's net receivables are the total amount of money its customers owe minus what the company estimates will likely never be paid.The Accounts Receivable to Sales Ratio is a business liquidity ratio that measures how much of a company's sales occur on credit. The Accounts Receivable to Sales Ratio is a business liquidity ratio that measures how much of a company's sales occur on credit. The formula for net credit sales is simple. First, take your total credit sales. Net Sales refers to your company's total sales during an accounting period less any allowances, sales returns, and trade discounts. Use the following formula to calculate net credit sales: Net Credit Sales = Gross Credit Sales Returns Discounts Allowances. To calculate the accounts receivable turnover ratio, you have to first find out the net credit sales (sales returns minus the sales allowances). The accounts receivable turnover ratio measures the number of times a company collects its average accounts receivable balance in a specific time period.